Patent application title: DIRECT PRODUCTION OF THERMAL ANTINEUTRONS AND ANTIPROTONS
Daniel R. Schaefer (Union, OH, US)
James M. Snead (Beavercreek, OH, US)
IPC8 Class: AG21G106FI
Class name: Induced nuclear reactions: processes, systems, and elements nuclear transmutation (e.g., by means of particle or wave energy) by neutron bombardment
Publication date: 2009-01-22
Patent application number: 20090022257
Patent application title: DIRECT PRODUCTION OF THERMAL ANTINEUTRONS AND ANTIPROTONS
Daniel R. Schaefer
James M. Snead
THOMPSON HINE L.L.P.;Intellectual Property Group
Origin: DAYTON, OH US
IPC8 Class: AG21G106FI
A method for obtaining free thermal antineutrons within the cage-like
structure of a fullerene molecule comprising irradiating the fullerene
molecule with free neutrons causing free neutrons to be trapped within
the fullerene molecule wherein the trapped neutron oscillates between the
neutron and antineutron states. A method for producing antiprotons
comprising irradiating a fullerene molecule with free neutrons and
trapping the neutrons within the fullerene molecule such that the
neutrons oscillate between neutron and antineutron states and in the
antineutron state decay and produce antiprotons.
1. A method for obtaining free thermal antineutrons within the cage-like
structure of a fullerene molecule comprising irradiating the fullerene
molecule with free neutrons causing free neutrons to be trapped within
the fullerene molecule wherein the trapped neutron oscillates between the
neutron and antineutron states.
2. The method of claim 1 wherein said fullerene molecule is a C60 or C70 fullerene molecule.
3. The method of claim 2 wherein said fullerene molecule is a C70 fullerene molecule.
4. The method of claim 1 wherein said method further comprises determining the presence of said trapped thermal antineutrons in the cage-like structure of said fullerene molecule by subjecting the fullerene to the steps of:(1) irradiating a sample of fullerene molecules with a neutron flux;(2) measuring the 511 KeV Ann. γ background event rate with a high-resolution gamma spectroscope during step (1) to obtain a "hot background" radiation rate for subsequent data reduction calculations;(3) withdrawing the fullerene molecules from the flux and performing a gamma spectrographic analysis on said fullerene sample using the same high-resolution gamma spectroscope as step (2), within about 11.25 minutes after the sample is withdrawn from the thermal neutron flux;(4) measuring the cumulative 511 KeV Ann. γ events in said fullerene sample beginning at least 11.25 minutes after step (3);(5) measuring the 511 KeV Ann. γ event rate data;(6) measuring the background 511 KeV Ann. γ event rate after the removal of the fullerenes from the high-resolution gamma spectroscope at the end of the experiment to obtain a "cold background" radiation rate;(7) determining the contribution of each identified contaminant to the cumulative 511 KeV Ann. γ event activity measured during the first hour time history; and(8) subtracting the calculated activity of each contaminant from the cumulative, observed, 511 KeV Ann. γ event data recorded in Step (4).
5. The method of claim 4 wherein said fullerene is a C60 or C70 fullerene.
6. The method of claim 5 wherein said fullerene is a C70 fullerene.
7. The method of claim 4 wherein said trapped thermal antineutron has thermal energy of about 0.025 electron volts.
8. A fullerene molecule containing a free thermal antineutron trapped within the cage-like structure of said fullerene molecule.
9. The fullerene molecule of claim 8 wherein said fullerene molecule is a C60 or C70 fullerene.
10. The fullerene molecule of claim 9 wherein said fullerene molecule is a C70 fullerene.
11. The fullerene molecule of claims 8 wherein said trapped antineutron decays to a positron, and an antiproton.
12. The fullerene molecule of claim 8 where the fullerene molecule also contains trapped free neutrons.
13. The fullerene molecule of claim 8 where the fullerene molecule is useful as a source of positrons, neutrons, antineutrons, or antiprotons.
14. A method for producing antiprotons comprising irradiating a fullerene molecule with free neutrons and trapping the neutrons within the fullerene molecule such that the neutrons oscillate between neutron and antineutron states and in the antineutron state decay and produce antiprotons.
BACKGROUND OF THE INVENTION
This application claims priority to U.S. application Ser. No. 11/850,106 filed Sep. 5, 2007, which is a continuation of U.S. application Ser. No. 11/158,205 filed Jun. 21, 2005, which in turn claims priority to provisional application Ser. No. 60/581,884 filed Jun. 22, 2004.
BACKGROUND OF THE INVENTION
This invention disclosure relates to a new method for the direct production of thermal antineutrons and thermal antiprotons from thermal neutrons. The process of neutron-antineutron oscillation produces the antineutrons. The neutron-antineutron oscillation process produces thermal antiprotons when the antineutrons decay.
The process of neutron-antineutron oscillation is a prediction of grand unification models in gauge field theories. Ignatovich1 and Golub2 discuss the theory behind this prediction. Stated plainly, the theory predicts that a neutron that is cold enough to be contained by the interior walls of a suitable vessel may oscillate into an antineutron without violating any quantum conservation laws. Ignatovich1 also predicts that the probability of an oscillation is proportional to the number of reflections of the cold neutron from the walls of the vessel. No current art demonstrates the ability to cause neutron-antineutron oscillation to occur. The applicants demonstrate that the art in this disclosure represents the first reduction of neutron-antineutron oscillation theory into practice.
Published Application 2002/0037066 discloses that fullerene molecules, such as C70, trap free neutrons inside the internal cavity of the fullerene molecule. The present disclosure is based on the discovery that neutrons trapped inside fullerene molecules undergo neutron-antineutron oscillation. In the previous disclosure, the applicants referenced neutron-antineutron oscillation only as a theoretical possibility.
The applicants have found that the number of neutron reflections per second per trapped neutron, as produced by this art, is similar to the number of reflections that Ignatovich1 predicts will produce a neutron-antineutron oscillation. Once a trapped neutron oscillates into an antineutron, the same number of reflections presumably returns the antineutron to the neutron state.
In other words, once the interior cavities of C70 fullerene molecules trap a population of neutrons, approximately 50% of the population actually exists in the antineutron state at any subsequent time.
The internal cavities of the fullerene molecules contain the neutrons and antineutrons until the neutrons and antineutrons decay or until the application of other current art forces their release. U.S. Published Application 2002/0037066 discusses this current art. If the application of current art does not first release them, the neutrons trapped in the fullerene molecules decay by the process of beta decay. The resultant beta decay radiation has a characteristic half-life of 10.25 minutes as the previous patent disclosure demonstrates.
The trapped antineutrons decay by positron decay. Positrons are electrons with a positive electrical charge. In other words, positrons are antielectrons. Positrons are distinguishable from beta particles because they will annihilate with electrons. The result is a distinctive gamma energy emission at 511 KeV. A gamma spectrometer readily detects and identifies this gamma emission.
The applicants' research demonstrates that these annihilation energy emissions exhibit a 10.25-minute decay half-life. This is the same half-life as the trapped neutrons demonstrated in the previous disclosure. The accepted half-life of a free neutron is 10.25 minutes. Antineutrons, presumably, also have a 10.25-minute half-life.
SUMMARY OF THE INVENTION
In accordance with the invention, each free neutron in a population of free neutrons trapped inside fullerene molecules oscillates between the neutron and antineutron states. This oscillation occurs at a rapid rate so that a significant percentage of the population is in the antineutron state at any given time. The predictions of Ignatovich1 and others suggest that 50% of the trapped neutrons are in the antineutron state at any given time.
One manifestation of this invention is a process that easily and economically converts free thermal neutrons into free thermal antineutrons. These antineutrons may decay to positrons, antiprotons, and neutrinos. The antiprotons thus produced have low thermal energy. A method that directly converts neutrons to antineutrons is new art. The ability of neutrons to undergo this conversion is a heretofore-undemonstrated prediction of theoretical physics. The trapping of the antineutrons is new art. Current art permits collection and storage of thermal neutrons but not the trapping and storage of antineutrons.
Another manifestation of the invention is a fullerene containing a trapped antiproton.
Another manifestation of the invention is a fullerene having a 511 KeV Ann. γ radiation with a half-life of 10.25 minutes +/-2 minutes.
Another manifestation of the invention is a method for producing antiprotons.
Ignatovich1 and Golub2 both discuss the possibility that neutrons may oscillate into antineutrons. This is a prediction of grand unification models in gauge field theories. As long as the electrostatic charge of a neutron is identically zero, this oscillation violates no quantum conservation law. It does violate one experimental "law," the conservation of baryon number. There is no theoretical basis for this "law." No published peer-reviewed observations violate it.
A characteristic of cold neutrons exploited by current art is their ability to reflect from solid surfaces. Ignatovich3 and Golub4 as well as Kosvintsev5 discuss this phenomenon. It allows the capture of neutrons inside a vessel. The publication date of Kosvintsev5, January-February 1977, illustrates that this art is not new. Further, Ignatovich1 proposes that, in theory; neutron-antineutron oscillation is detectable in such an experiment. Ignatovich1 proposes that the probability of occurrence of neutron-antineutron oscillation is a function of the number of neutron reflections from the vessel walls.
The probability of occurrence, according to Ignatovich1, is roughly one oscillation for every 1013 reflections. The detection of neutron-antineutron oscillation may be a simple matter of filling a suitable vessel with enough cold neutrons so that the number of reflections raises the probability of an oscillation to near unity. Once a neutron oscillates into an antineutron state, it may annihilate with a neutron, or it may decay. It may also oscillate back to a neutron. The antiproton resulting from antineutron decay would annihilate with a proton. Appropriate instrumentation would detect and identify either neutron-antineutron or proton-antiproton annihilation events through the unique high-energy gamma signature of each reaction.
Ignatovich1 and Golub2 also discuss the technical problems that have prevented positive experimental results to date. In current art, the numbers of reflections occurring before all the neutrons decay or atomic nuclei capture them are orders of magnitude less than the calculated number required. Hence, the invention in this disclosure is needed to establish circumstances where a sufficient number of reflections can occur.
Fullerene molecules are a third allotrope of carbon. Fullerenes usually have the form of hollow spheroids or long hollow tubes closed by hemispherical ends. All fullerenes are dense shells of carbon atoms surrounding an interior cavity. Fullerenes exhibit a surprising variety of phenomena, from ferromagnetism to superconductivity. Other carbon allotropes do not exhibit these phenomena.
One novel behavior that fullerenes exhibit is the ability to trap or adduct a variety of chemical species inside their internal cavities. Both peer reviewed and popular literature have widely reported this behavior. The only requirement seems to be that the internal cavity of the fullerene is larger than the adducted specie. The chemical specie forms an internal adduct with the fullerene when it is inside the cavity. Either it bonds to the internal surface of the fullerene or it moves freely within the confines of the cavity.
Less widely reported is the ability of fullerene molecules to form internal adducts with subatomic particles. Niedermayer6 and Percival7 discuss this phenomenon observed in both C60 and C70. The fullerene molecules are able to form internal adducts with muons in the form of muonium. Percival7 states that the muonium appears to be a "non-bonded muonium inside the cage." Niedermayer6 states, "The calculations of Percival and Wlodek indicate that muonium is stabilized in the interior of the C60 at approximately the center of the molecule." The incident muons in both papers are quite energetic at 4 MeV. The fullerenes still trap 25% of these incident muons as muonium adducts. The applicants infer from this that the trapping mechanism, what ever it may be, is robust.
Estreicher8 calculated the existence of a deep energy well at the center of a C60 fullerene molecule when the adducted specie is a simple hydrogen atom. Jimenez-Vasquez9 demonstrated experimentally that C60 fullerene molecules form internal adducts with tritium atoms. This partially confirms Estreicher8. Jimenez-Vasquez9 did not confirm that the tritium adduct was at the center of the C60 fullerene. The Jimenez-Vasquez9 tritium may bond to the interior surface of the C60 molecule. The applicants consider this unlikely because the muons of Niedermayer6 and Percival7 only bonded to the exterior of the C60 and C70 fullerene molecules. The muonium adducts, which mimic hydrogen atoms, were internal, and were not bonded to the wall of the fullerene molecule. Huffman10 demonstrates macroscopic containers that trap neutrons, also an electro-statically neutral specie with a nuclear magnetic dipole moment, by the neutron's own magnetic field. The magnetic field of the neutron is what prevents low energy neutrons from penetrating solid surfaces. The applicants believe this same mechanism traps muonium, simple hydrogen, and tritium in the center of fullerene molecules. Like neutrons, they are all electro-statically neutral and they all have magnetic fields.
In accordance with the invention, the internal surfaces of fullerene molecules should produce the same behavior in cold neutrons and cold antineutrons as the cold neutron behavior produced by the internal surfaces of the macroscopic graphite vessels described by Ignatovich3, Golub4, and Kosvintsev5. Both macroscopic graphite vessels and fullerene molecular "vessels" are made of densely packed carbon atoms. The nuclei of carbon atoms have a very low probability of neutron capture. This property of carbon nuclei reduces the chance that the process of neutron capture by the carbon nuclei in the walls of a vessel will remove free neutrons from the cavity of either vessel.
The interior cavities of C70 molecules seem to be superior to graphite vessels in this respect. The work of Estreicher8 indicates that the cavity of a fullerene molecule may hold an interior free neutron further away from the nuclei of the carbon atoms than graphite does. In a graphite vessel, the same free neutron could approach the carbon atoms more closely. This increases the chances that the carbon nuclei of a macroscopic graphite vessel would capture a free neutron inside the vessel.
Each neutron trapped inside a fullerene will see the requisite number of reflections, about 1013 as calculated by Ignatovich1, approximately once each second. This is due to the tiny diameter of the internal cavity of the fullerene molecule, about 3 angstroms, and the thermal velocity of a neutron, about 2700 meters/second, at room temperature.
The estimate of 1013 reflections per second is conservative. As discussed already, Niedermayer6 and Percival7 suggest that the muonium does not have freedom to move about the entire internal cavity. It is restricted to "near" the center of the cavity. If this restriction applies to neutrons, they also have an even smaller diameter to cross. Thus, their rate of reflection may be much higher than the estimate. This raises the probability of an oscillation accordingly.
As described in U.S. Published Application 2002/0037066, fullerene molecules containing a population of trapped free neutrons exhibit beta particle emissions with a decay half-life of 10.25 minutes. This half-life is due to the beta decay of the trapped free neutrons. If the population of trapped free neutrons oscillates between the matter and antimatter state as Ignatovich1 and Golub2 predict, the fullerene molecules will also emit electron-positron annihilation gamma energy (Ann. γ) with a half-life of 10.25 minutes. The applicants have repeatedly detected this gamma emission and measured its half-life. The Ann. γ emission has both the predicted energy, 511 KeV, and the predicted half-life, 10.25 minutes.
The beta decay of neutrons does not release enough energy to create positrons. The creation of positrons requires a minimum of 1.022 MeV regardless of the process. Free neutron beta decay releases only 0.782353 MeV. Neutron-antineutron oscillations produce positrons directly by positron decay of antineutrons as well as by numerous secondary processes.
Many processes that occur subsequent to a proton-antiproton annihilation produce the electron-positron, Ann. γ emission observed in this invention. They all require the decay of an antineutron as the initial process. The antineutron decay process has a half-life of 10.25 minutes. All the subsequent processes producing electron-positron Ann. γ emissions that result from an antineutron decay are virtually instantaneous by comparison. As a result, these subsequent Ann. γ emissions will also appear to have a 10.25-minute half-life.
If fullerenes do not form internal adducts with neutrons, the irradiation of pure fullerenes by neutrons will produce neither beta decay events nor Ann. γ events with 10.25-minute half-lives. Detection of only beta decay radiation with a 10.25-minute half-life indicates formation of internal neutron adducts as was documented in the U.S. Published Application 2002/0037066. Detection of both the beta decay and the electron-positron Ann. γ with 10.25-minute half-lives indicates that both adducted neutrons and antineutrons due to neutron-antineutron oscillations are present in the fullerenes.
U.S. Published Application 2002/0037066, discusses the liberation of trapped neutrons from the interiors of fullerene molecules. Briefly, any of a number processes that release a neutron from the fullerene molecule will also accomplish this result for the antineutrons.
It is also possible to form a beam of fullerene molecules containing trapped neutrons and antineutrons in a particle accelerator. Once the accelerator forms the beam, it can direct the beam onto a thin membrane of metal or ceramic. That will stop the fullerenes but not the neutrons and antineutrons. As noted by the earlier patent application, this art permits the creation of a uniform beam of neutrons and antineutrons at energies above those available in natural nuclear reactions. The invention in this current disclosure is that these techniques create a uniform beam of mixed neutrons and antineutrons. The applicants are unaware of any other art that can produce a uniform beam of high-energy neutrons and antineutrons.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates a timeline for the experimental procedure.
FIG. 2 is a graphic of normalized, integrated "remnant" data left after all events due to contaminants and background activities have been removed from the first hour time history of normalized, integrated 511 KeV Ann. γ events recorded after the sample left the neutron flux.
FIG. 3 is a comparison of the normalized, integrated remnant data from FIG. 2 compared to the 10.39-minute half-life "best" curve fit normalized, integrated, exponential, decay curve and the 10.25-minute normalized, integrated, exponential, decay curve of free antineutrons.
FIG. 4 is a comparison of the normalized, cumulative remnant data from FIG. 2 compared to the 10.25-minute normalized, integrated, exponential, decay curve of free antineutrons. The decay curves of the three contaminants in the fullerene sample are also plotted on the same chart to show that there is no confusion between the remnant data and the decay of the detected contaminants.
The applicants offer the following experimental procedure and results as substantial evidence of the reality of the invention in this disclosure. The applicants do not intend that this demonstration in any way constrains the claims for the invention in this disclosure. Likewise this demonstration does not restrict or define the applications of the invention. This demonstration is merely one instructive and explanatory application of the invention in this disclosure.
The results produced by this experiment completely conform to the predictions of Ignatovich1 and Golub2. The experimental results are unprecedented. These experimental results have no other plausible explanation that conforms to any peer-reviewed, published predictions.
General Description of the Experimental Procedure That Demonstrates the Invention
Neutrons decay through the release of beta particles. Antineutrons decay through the release of positrons. The decay half-life of a population of free neutrons is 10.25 minutes. The presumption is that the decay half-life of a population of antineutrons is also 10.25 minutes.
While the beta particles do not further interact to produce additional gamma emissions, due to the relatively low energy of the beta particle released from a decaying neutron, the positrons annihilate with electrons very shortly after their emission from the decaying antineutrons, to produce a well-characterized gamma ray of 511 KeV. Beta particles are directly detectable by a beta particle counter while the positron emission is detectable by its 511 KeV gamma ray emission with a gamma spectrometer.
Counting beta particle emissions from the sample as a function of time and then performing an analysis of this data to determine that the half-life of the measured beta particle emissions is 10.25 minutes will determine the presence of a population of free neutrons in a sample of fullerenes. Other radioactive emitters in the sample, should they exist, can also emit detectable beta particles. Although these beta particles are of different energies, the beta counter only detects a beta particle and not its energy. Hence, a mathematical process called "data stripping," which has been used widely for many years, will isolate and remove the counted beta particles from non-neutron sources. This results in a reduced data set containing only "remnant" beta events. Determination of the half-life of these events will identify their source.
In a like manner, the presence of a population of free antineutrons in a fullerene sample can be determined by counting, as a function of time, the gamma ray events with the specific 511 KeV gamma ray energy corresponding to positron-electron annihilation. A gamma spectrometer counts these events. Other radioactive emitters in the sample, should they exist, can emit positrons or other high-energy particles that result in the production of positrons and produce positron-electron annihilation gamma photons at 511 KeV. As with the analysis of the beta particle data, the application of the data stripping process will isolate and remove the counted annihilation events from non-antineutron sources. This results in a reduced data set containing only remnant 511 KeV gamma ray events that are not due to contaminant or background emissions. A simple analysis of these data will determine the half-life of their source.
U.S. Published Application 2002/0037066 discussed the application of this process to the detection of the decay of a population of free neutrons. In this demonstration, neutrons first irradiate one sample of fullerenes. The subsequent 511 KeV gamma ray annihilation energy measurements and data analyses demonstrate that a sizable remnant of gamma ray events exists. The half-life of the source of this radiation corresponds to, within experimental error, the 10.25-minute half-life of the antineutron.
Detailed Description of the Experimental Procedure that Demonstrates the Invention
BGCold=the rate of background radiation events with the a cold reactor BGHot=the rate of background radiation events with the reactor at the power setting of the experiment NCalc.=the calculated cumulative number of decay events at any time, t, where tObs.≦t≦60 minutes Nt=the initial abundance of the emitter responsible for "remnant data" NNa=the abundance of 24Na in the sample, the derivative is the intensity of radiation due to 24Na decay N.sub.NCalc.=the normalized value of NCalc. N.sub.NObs.=the normalized value of NObs. NObs.=the observed cumulative number of remnant decay events at any time, t, where tObs.≦t≦60 minutes t=the time after the samples leave the neutron flux of the reactor where tObs.<t<60 minutes tm=the time a "subsequent data set" is measured to facilitate the "data stripping" process, tm>60 minutes tObs.=the time when the observation of cumulative events begins t1/2=the decay half-life of a radioisotope ΔN=the number of observed decay events occurring in a given finite time step, Δt Δt=the length of any finite time step used to calculate decay rates
All times are in minutes. All rates are in events per minute. C70 is the notation for the weight of the fullerene molecules that this specific experiment uses. The applicants claim the properties demonstrated for C70 for other weights of fullerene. Cx is the more general notation.
II. Neutron Irradiation of Fullerenes
The Ann. γ events, if due to antineutron decay, are only distinguishable from other sources by their half-life. Thus, to demonstrate the invention, the applicants take great care, in part through the purchase of high-purity samples, to exclude contaminants from the fullerene samples in this demonstration. The most frequent source of the applicants fullerene samples is Materials and Electrochemical Research Corporation (MER Corp.), 7960 South Kolb Road, Tucson, Ariz. 85706, Phone: 520.574.1980, Fax: 520.574.1983, MERCORP MERCORP.COM. The applicants buy material with the catalog number MR7SB.
The applicants discard fullerene samples containing contaminants, detectable by a gamma spectrometer with neutron activation half-lives between 2.25 and 60 minutes. This insures that any contaminant emitter in the fullerenes has a half-life separated by a factor of at least 4.6 from the 10.25-minute half-life associated with free neutron or free antineutron decay.
The original source of the neutrons in this demonstration is not important to the invention. In order to demonstrate this invention, the applicants employed neutrons produced in a nuclear reactor. This source is inexpensive and it supplies a high flux of neutrons, approximately 5×1013 neutrons per square centimeter per second.
The neutron irradiation of the fullerene sample is similar to a neutron activation experiment. The neutron irradiation of the fullerene sample occurs in a high flux location in a nuclear reactor. The sample irradiation lasts for a period appropriate to the half-life of free neutrons. Typical exposure times are 5 to 15 minutes. The reactor power is set as close to the maximum as circumstances permit to produce as many neutrons as possible. At the Ohio State Reactor Laboratory, the location where this demonstration occurred, the maximum reactor power is 500 Kilowatts. The measurement of the background radiation level, BGHot, for the gamma spectrometer occurs while the reactor is irradiating the fullerene sample. The data reduction that demonstrates the presence of the Ann. γ requires this background measurement.
Transfer of the fullerene sample from the reactor vial into a clean, un-irradiated vial occurs immediately after removal of the vial containing the fullerene sample from the reactor. This insures that the vial does not contribute to any observed radiation. Sealing the new vial insures that no volatile or gaseous species such as 41Ar leaks out of the vial and mimics the decay of some non-existent specie.
III. Data Collection
Once the neutron irradiation of the fullerene sample provides a population of trapped neutrons and antineutrons inside the internal cavities of the fullerenes, data are collected. The purpose of these data is two-fold. First, it is necessary to identify and remove all activity that is due to background emissions and neutron-activated contaminant emissions from the raw data. Second, any residual activity must conform to the results predicted by Ignatovich1 and Golub2. The procedures in this section collect all the data needed to satisfy these two purposes.
After the transfer of the fullerene sample to a new vial, the procedure assays the activated contaminants in the fullerene sample with the gamma spectrometer to insure that there are no observable contaminants with half-lives between 2.25 and 60 minutes. In the actual experiments, the typical contaminants are only 24Na (t1/2=897.54 minutes), 28Al (t1/2=2.2414 minutes), and 41Ar (t1/2=109.61 minutes). Some experiments exhibit only one or two of these contaminants. The fullerene sample in this demonstration exhibited all three contaminants.
The fullerene sample is not disturbed again for the rest of the experiment once it is in the gamma spectrometer. Movement will change the sample-to-detector geometry. This can affect the observed decay rate and corrupt the data.
This procedure insures that the half-lives of the activated species are different enough from each other and from the half-life of free antineutrons that a technique known as "data stripping" is applicable. This technique is an accepted data reduction procedure for neutron activation experiments. Rakovic11 and Lyon12 describe it in detail. The method provides a way to separate the data from two or more emitters when the only observable difference between the emitters is their respective half-lives. FIG. 1. is the timeline of a typical experimental procedure.
Simply waiting for a minimum of 11.25 minutes after removing the fullerene sample from the reactor and before collecting any data other than the contaminant assay effectively removes any influence from activated 28Al. In this time, five 28Al half-lives, 97% of any 28Al present in the fullerene sample will decay. Only about half of the trapped neutrons are lost. The influences of 24Na and 41Ar, by virtue of their longer half-lives, are virtually unaffected.
The first 11.25 minutes after removal of the fullerene sample from the thermal neutron flux allow time to transfer the fullerene sample to a clean, un-irradiated vial. The gamma spectrometer also assays the activated contaminants in the fullerene sample during this time.
After the vial transfer, the assay, and the delay to eliminate any emissions from 28Al, one records the cumulative activity of the sample continuously for 48.75 minutes or until t=60 minutes, whichever comes first. The applicants refer to these 48.75 minutes of data as the "first hour" time history. The first hour time history is simply the total number of 511 KeV Ann. γ events observed since tObs. One records this cumulative total at 30-second time steps. The start of the first hour time history of cumulative activity is tObs., the time when the observation of cumulative events begins. The first hour time history ends one hour after the fullerenes exit the neutron flux.
Note that in the sample data presented in the charts, the first hour data collection actually began at 17.5 minutes. The times quoted above are the ideal times. In real world experiments, the steps of transferring the fullerene sample to a clean vial and the contaminant assay sometimes take longer than planned. Even though the trapped neutron/antineutron population continued to decay during the additional 6.25 minutes, the results were in excellent agreement with theory. Regardless of when t=tObs., the first hour data collection ends at t=60.
"Normalization" of the cumulative total in the first hour time history or any other decay data in this disclosure means that the total number of events recorded at each time step is divided by the total number of counts in the final time step of the data.
51.25 minutes after t=0, five neutron half-lives, 97% of the neutrons present at t=0 are gone. Effectively, only the 24Na, 41Ar and the BGHot background are detectable by the gamma spectrometer. The assumption is that the same slightly elevated background radiation level due to the reactor operating at full power is still present until the first hour time history of cumulative activity is complete. After this time, the assumption is that the background radiation is BGCold, the background activity with a cold reactor. 540 minutes after t=0, equal to five 41Ar half-lives, only the 24Na and BGCold are left.
The sample data and calculations in this discussion of the experimental procedure are all from the Ann. γ data from Sample E, Run 3, 27 Nov. 2000. The gamma spectrometer assay allows scheduling of subsequent data collections needed to strip the influences of the two long half-life contaminants, 24Na and 41Ar.
The assumption is that the rate of decay of the activity in the fullerene sample after 540 minutes is due entirely to the cold reactor background, BGCold, and to 24Na decay. The assumption is that all 41Ar as well as all shorter half-life emitters in the fullerene sample have decayed to background at this time. At 540 minutes, this process requires a measurement of the decay rate of the fullerene sample. The decay rate in Sample E is collected by measuring the number of 511 KeV Ann. γ events, ΔN, in a finite time, Δt, centered on the scheduled measurement time, tm or 540 minutes. In this experiment, ΔN was the number of 511 KeV Ann. γ events occurring from 530 minutes until 550 minutes after t=0.
Since this was the only decay rate measurement needed in this experiment subsequent to the "first hour" data, the fullerene sample was removed from the gamma spectrometer and BGCold was measured similarly to the decay rate of 24Na.
The following expression calculates the rate of accumulation of 511 KeV Ann. γ gamma events due to the decay of 24Na at 540 minutes:
This expression defines the rate of accumulation of 24Na decay events at 540 minutes. A handbook or the National Nuclear Data Center website provides the half-life of 24Na, as well as all other activated species. The exponential decay function provides the rate of accumulation of 24Na decay events at any time, t after tObs.:
(dNCalc./dt)t=tm=-(dNNa/dt)t=tObsexp[-ln(2)(- tm-tObs.)/t1/2] (2)
Rearranging the terms and combining Eqs. (1) and (2) yields an equation for the 24 initial intensity of 24Na decay at t=tObs.:
Δ Δ ##EQU00001##
The integral of Eq. (2), when the initial value of NCalc. is assumed to be zero at t=tObs., gives the value NCalc. at any time, t:
Combining Eqs. (3) and (4) yields an expression for NCalc. at any time, t after tObs., that is entirely in terms of the subsequent data measurement scheduled by the results of the gamma spectrometer, the cold background gamma activity, BGCold, and data available in handbooks:
Δ Δ ##EQU00003##
Equation (5) is the contribution of 24Na to the first hour time history of 511 KeV Ann. γ gamma events. The number of 24Na events, Ncalc., at each time step in the first hour time history may be calculated and subtracted from the total. Data needed to calculate BGHot are collected while the fullerene sample is in the reactor. The calculation of BGHot is the same as the calculation of BGCold. Multiplying BGHot by the length of a time step in the first hour time history of 511 KeV Ann. γ gamma events and subtracting the product from each data point removes the contribution of hot background events from the first hour time history.
In cases where there are two or more sets of subsequent data collections, as determined by the results of the gamma spectrometer assay of the irradiated fullerene sample, the process applies a similar process sequentially to each set of subsequent data. It begins with the longest half-life contaminant and works sequentially to the shorter half-life contaminants.
In this example, after removal of the 511 KeV Ann. γ gamma events due to 24Na decay, the last remaining contaminant with a half-life longer than 51.25 minutes is the 41Ar in the fullerene sample. The removal of 511 KeV Ann. γ gamma events due to the last long-life contaminant, 41Ar in this example, proceeds by a slightly different process than the removal of other long half-life contaminants.
There is no need to schedule a subsequent data collection for this remaining contaminant. An assumption, stated earlier, is that any trapped neutrons or antineutrons all effectively decay out of the fullerenes by t=51.25 minutes. This assumption permits the calculation of NCalc. for the 41Ar contaminant directly from the first hour time history of 511 KeV Ann. γ gamma events. ΔN is simply the sum of the remaining gamma events recorded after 51.25 minutes. Remember, all of the other events from the background activity and the other contaminants are already gone. Equation (5) becomes:
Equation (5) is normalized by dividing it by the value of NCalc. at t=60. Equation (7) calculates the theoretical normalized data in FIGS. 3 and 4 at each time, t, where tObs.<t<60.
After the subtraction of the 41Ar contribution to the first hour time history of 511 KeV Ann. γ events, there should be no 511 KeV Ann. γ events left in the data set. The process has eliminated all identifiable sources of 511 KeV Ann. γ event data from the first hour time history. As FIG. 2 illustrates, data are left.
These remnant data have a half-life that is close, at 10.39 minutes, to the accepted half-life of free neutrons and, presumably antineutrons, e.g., 10.25 minutes. FIG. 3. shows the close agreement between the accepted 10.25-minute cumulative decay curve and the data generated in this experiment.
The gamma spectrometer at Ohio State can detect all gamma ray-emitting atomic species produced by neutron activation in the reactor at Ohio State. The gamma spectrometer detects 511 KeV Ann. γ-emissions with a half-life near 10.25-minutes. The gamma spectrometer does not detect any atomic specie that can produce such emissions. These remnant emissions completely conform to what the gamma spectrometer would detect if the remnant emissions were a result of the decay of antineutrons.
FIG. 4. shows a comparison of the measured remnant data, the 10.25-minute half-life, and the detected contaminants when plotted as normalized, cumulative decay.
The conclusion is that the remnant emissions are due to the decay of antineutrons. This conclusion supports the assertion that the invention in this disclosure produces antineutrons by neutron-antineutron oscillation. Since antiprotons are a decay daughter of antineutrons, an unstable particle, the invention must also produce antiprotons.
The applicants emphasize that the detected remnant data represents the majority of the detected 511 KeV Ann. γ events in the unreduced raw data. Trace data are not the basis for these results. Commercially available fullerenes yield these results. No extraordinary processing of the fullerenes is required to obtain these data. This experiment used fullerenes that were very clean but they were ordered from MER Corporation's product catalog.
Current art does not enable controlled production of antineutrons in predictable quantities. They remain exotic particles observed, occasionally and indirectly, in reactions in particle accelerators. The invention in this disclosure enables a controlled process that produces significant quantities of antineutrons.
This invention also enables the formation of a controlled beam of antiprotons at a uniform and arbitrary energy. This invention also enables a mixed beam of neutrons and antineutrons at a uniform and arbitrary energy.
This invention enables direct confirmation that the half-lives of antineutrons and neutrons are identical. At present, it is only an accepted assumption that the half-lives are identical. The process can also produce antineutrons in quantities that are significant to engineering.
Current art enables the controlled production of antiprotons in significant quantities. Only a few large particle accelerators have ever done this before now. Presently, only CERN and Fermi lab produce antiprotons in quantity.
This invention can change this situation significantly. It enables production of antiprotons at any location where a neutron flux is available. This includes but is not limited to most of the world's research reactors. The cost of production will be little more than the cost of operating the reactor.
The annihilation of protons and antiprotons represents the most concentrated form of energy known to exist. The annihilation of a proton and an antiproton converts 100% of the mass of the two particles into energy. The ability to produce antiprotons inexpensively and in significant quantities makes this energy available for engineering purposes.
The late Doctor Robert L. Forward published extensively on the technologies that plentiful and inexpensive antiprotons would enable. His book Mirror Matter15 summarizes many of his previous publications.
Among these are new diagnostic and treatments in medicine. A beam of antiprotons can do many of the tasks now performed by MRI, PET, and X-ray machines. The same beam that detects diseased tissue may also treat it. This radiation treatment is controllable so that there is no injury to healthy tissue. Present radiation treatments cannot do this.
Similarly, a beam of antiprotons can perform as a tool for detecting flaws in materials. Not only can it detect a flaw or contaminant in parent material, it can repair some of them. As in the medical application, antiprotons can perform this repair without causing any additional damage.
The discovery13,14 in 1991 that antiprotons catalyze nuclear fission reactions far more efficiently and in far more nuclei than neutrons is another property of antiprotons that no one has explored completely. Neutrons only catalyze fission in three very rare or manmade nuclei, 233U, 235U, and 239Pu. Antiprotons can catalyze fission in many common, naturally occurring, non-radioactive nuclei. Antiproton catalyzed fission produces many more neutrons and may release more energy than neutron-catalyzed fission.
One application of antiproton-catalyzed fission that has received significant research effort is propulsion. Antiprotons provide a variety of propulsion options for vehicles as diverse as submarines, aircraft, and spacecraft. The potential power or thrust per pound is literally many orders of magnitude greater than current art chemical propellants and even current art nuclear propulsion technology can deliver. This is especially true when antiproton catalyzed fission is used to initiate thermonuclear reactions. Dr. Forward15 covers some of these applications in his book. The American Institute of Aeronautics and Astronautics publication Fusion Energy in Space Propulsion16 also covers this subject in detail.
A recent newspaper article17 discuss a new solid-state means of producing neutrons using a special chip. This may provide an alternative source of neutrons and, when coupled to this invention, provide the means to generate antiprotons and antineutrons at locations remote from nuclear reactors.
This invention also enables a new science of nuclear fission and fusion reactions catalyzed by antineutron reactions.
1V. K. Ignatovich translated by G. B. Pontecorvo, The Physics of Ultracold Neutrons, Clarendon Press, Oxford U. K, 1990, pp. 304-305, ISBN 0-19-851015-2. 2R. Golub, D. Richardson, and S. K. Lamoreaux, Ultra-cold Neutrons, Adam Hilger IOP Publishing Ltd., 1991 p. 216, ISBN 0-7503-0115-5. 3V. K. Ignatovich translated by G. B. Pontecorvo, The Physics of Ultracold Neutrons, Clarendon Press, Oxford U. K, 1990, pp. 1-33, ISBN 0-19-851015-2. 4R. Golub, D. Richardson, and S. K. Lamoreaux, Ultra-cold Neutrons, Adam Hilger IOP Publishing Ltd., 1991 pp. 19-31, ISBN 0-7503-0115-5. 5Yu. Yu. Kosvintsev, Yu. A. Kushnir, V. I. Morozov, and G. I. Terekhov, "Possible Use of Wall Traps and Magnetic Traps of Ultra-Cold Neutrons for Measuring the lifetime of the Free Neutron", translated from Pribory I Tekhnika Eksperimenta (Instruments and Experimental Techniques), Vol. 20, No. 1,Pt. 1, January-February 1977, pp. 43 6Ch. Niedermayer, I. D. Reid, E. Roduner, E. J. Ansaldo, C. Bernhard, U. Binninger, H. Gluickler, E. Recknagel, J. I. Budnick, and A. Weidinger, "Simultaneous Observation of Muonium and Multiple Free Radicals in Muon-implanted C70," Physics Review B, Vol. 47, No. 16, 15 Apr. 1993, p. 10,923. 7P. W. Percival and S. Wlodek, "The Structure of C60Mu and other Fullerenyl Radicals," Chemical Physics Letter, Vol. 196, No. 3, 4, 14 Aug. 1992, p. 8S. K. Estreicher, C. D. Latham, M. I. Heggie, R. Jones, and S. Oberg, "Stable and Metastable States of C60H: Buckminsterfullerene Monohydride," Chemical Physics Letters, Vol. 196, No. 3, 4, 14 Aug. 1992, p. 311 9H. A. Jimenez-Vasquez, R. J. Cross, M. Saunders, and R. J. Poreda, "Hot-atom Incorporation of Tritium Atoms into Fullerenes," Chemical Physics Letters, Vol. 229, 21 Oct. 1994, pp. 111-114 10p. R. Huffman, C. R. Brome, J. S. Butterworth, K. J. Coakley, M. S. Dewey, S. N. Dzhosyuk, R. Golub, G. L. Greene, K. Habicht, S. K. Lamoreaux, C. E. H. Mattoni, D. N. McKinsey, F. E. Wietfeldt, and J. M. Doyle, "Magnetic Trapping of Neutrons,", Nature, Vol. 403, 6 Jan. 2000, pp. 62-64 11Miloslav Rakovic translated by D. Cohen, Activation Analysis, CRC Press, 1970; pp 191-194, Library of Congress Catalog Number 71-107282. 12William S. Lyon--editor, Guide to Activation Analysis, D. Van Nostrand Company, Inc., Princeton, N.J., 1964, pp. 131-133, Library of Congress Catalog Number 64-23964 13R. A. Lewis, R. Newton, G. A. Smith, and R. J. Kanzleiter "Antiproton-Boosted Microfission," Nuclear Science and Engineering, Vol. 109, December 1991, pp. 411-415 14B. Chen, et al, "Neutron Yields and Angular Distributions Produced in Antiproton Annihilation at Rest in Uranium," Physical Review C, Vol. 45, May 1992, pp. 2332-2337 15Robert L. Forward, Ph.D. and Joel Davis, Mirror Matter Pioneering Antimatter Physics, John Wiley& Sons, Inc., 1988, ISBN 0-471-62812-3 16Terry Kammash--editor, Fusion Energy in Space Propulsion, American Institute of Aeronautics and Astronautics, 1995, ISBN 1-56347-184-1 17Dan Vergano, "Gee-whiz nuclear-fusion gadget surprises Scientists with its simplicity," USA Today article, p. 8D, 28 Apr. 2005
Having described the invention in detail and by reference to specific embodiments thereof, it will be apparent the numerous modifications and variations are possible without departing from the spirit and scope of the invention.
Patent applications by Daniel R. Schaefer, Union, OH US
Patent applications by James M. Snead, Beavercreek, OH US
Patent applications in class By neutron bombardment
Patent applications in all subclasses By neutron bombardment