ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Passport Systems Inc filed Critical Passport Systems Inc Priority to US12/139,050 priority Critical patent/US8718219B2/en Assigned to PASSPORT SYSTEMS, INC. Original Assignee Passport Systems Inc Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Ledoux Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related, expires Application number US12/139,050 Other versions US20090074128A1 Google Patents Non-intrusive method to identify presence of nuclear materials using energetic prompt neutrons from photon-induced fissionÄownload PDF Info Publication number US8718219B2 US8718219B2 US12/139,050 US13905008A US8718219B2 US 8718219 B2 US8718219 B2 US 8718219B2 US 13905008 A US13905008 A US 13905008A US 8718219 B2 US8718219 B2 US 8718219B2 Authority US United States Prior art keywords energy neutron neutrons photon container Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US8718219B2 - Non-intrusive method to identify presence of nuclear materials using energetic prompt neutrons from photon-induced fission = Xe in this well gas, in air, and in other terrestrial samples are shown to be consistent with a very simple and straight-forward chronology of events in the early solar system.US8718219B2 - Non-intrusive method to identify presence of nuclear materials using energetic prompt neutrons from photon-induced fission This analysis showed that 95.9% of the fission gas in this case resulted from the spontaneous fission and only 4. The absolute yields of the stable xenon aad krypton fission products in U/sup 238/ spontaneous fission were determined from an analysis of the inert gases from the Cinch Jake mineral. Inert gas losses from the remaining five minerals ranged from 20% to 75%. ![]() Only one of the six minerals, Cinch Lake pitchblende, retained essentially all of its fission product inert gases throughout geological time. This discrepancy in the mass 129 chain yield measured at I/sup 129/ and at Xe/sup 129/ was not resolved. ![]() Internal consistency in the analysis was achieved only when the Xe/sup 129/ yield used for the U/sup 235/ thermal neutron fission component was 20% lower than that reported by Purkayastha and Martin at I/sup 129/. The fission products were resolved into a U/sup 238/ spontaneous fission component, a U/sup 235 neutron-induced fission component, and a U/sup 238/ neutron-induced fission component. The absolute abundances of the isotopes of fissionproduct xenon and krypton in six uranium minerals were determined mass spectrometrically using the isotope dilution technique.
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