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Enhanced Control of Nuclear Lifetimes for Ultra-Energetic Materials Using Electron-Nuclear Processes.

AD1059235

Publication Date	2016
Personal Author	Carroll, J. J.; Chiara, C. J.
Page Count	86
Abstract	Radioisotopes can store 100,000 times the energy of chemical batteries or fuel cells for durations of many decades or longer. The ability to utilize such ultra-energetic materials for Army power and energy applications would be a truly revolutionary advance. With very long storage lifetimes, the output power achievable with radioisotopes is limited, unless metastable nuclear excited states (isomers) can be used to provide different time scales for energy storage and release. US Army Research Laboratory mission research is underway to investigate methods by which to switch certain radioisotopes from long-lived to short-lived states via direct interactions with nuclei. Supplemental to that program, this special Directors Research Initiative project investigated the possibility of an indirect method via atomic-nuclear interactions, which has been proposed to enhance the efficiency of such switching under specific conditions. The process of nuclear excitation by electron capture was studied in a series of experiments based on a nuclear fusion-evaporation reaction in inverse kinematics. A full analysis is not yet complete, but initial positive indications suggest this approach has provided the first evidence of this new physical effect.
Keywords	Alpha particles Angular momentum Charged particles Detectors Materials Quantum numbers Spectra Energetic materials Internal conversion Nuclear properties Electron capture Electrons Energy Nuclear reactions Doppler effect Energy storage Gamma rays Gamma decay Radioactive decay Nuclear physics Nuclear isomer 93mo Neec Isomer depletion Directors research initiative (dri)
Source Agency	Non Paid ADAS
NTIS Subject Category	71 - Materials Sciences 97 - Energy 74H - Nuclear Warfare
Corporate Authors	Army Research Lab., Adelphi, MD.
Document Type	Technical Report
Title Note	Technical Report,01 Oct 2013,31 Dec 2015
NTIS Issue Number	201911

Enhanced Control of Nuclear Lifetimes for Ultra-Energetic Materials Using Electron-Nuclear Processes.

Enhanced Control of Nuclear Lifetimes for Ultra-Energetic Materials Using Electron-Nuclear Processes.
AD1059235

Publication Date	2016
Personal Author	Carroll, J. J.; Chiara, C. J.
Page Count	86
Abstract	Radioisotopes can store 100,000 times the energy of chemical batteries or fuel cells for durations of many decades or longer. The ability to utilize such ultra-energetic materials for Army power and energy applications would be a truly revolutionary advance. With very long storage lifetimes, the output power achievable with radioisotopes is limited, unless metastable nuclear excited states (isomers) can be used to provide different time scales for energy storage and release. US Army Research Laboratory mission research is underway to investigate methods by which to switch certain radioisotopes from long-lived to short-lived states via direct interactions with nuclei. Supplemental to that program, this special Directors Research Initiative project investigated the possibility of an indirect method via atomic-nuclear interactions, which has been proposed to enhance the efficiency of such switching under specific conditions. The process of nuclear excitation by electron capture was studied in a series of experiments based on a nuclear fusion-evaporation reaction in inverse kinematics. A full analysis is not yet complete, but initial positive indications suggest this approach has provided the first evidence of this new physical effect.
Keywords	Alpha particles Angular momentum Charged particles Detectors Materials Quantum numbers Spectra Energetic materials Internal conversion Nuclear properties Electron capture Electrons Energy Nuclear reactions Doppler effect Energy storage Gamma rays Gamma decay Radioactive decay Nuclear physics Nuclear isomer 93mo Neec Isomer depletion Directors research initiative (dri)
Source Agency	Non Paid ADAS
NTIS Subject Category	71 - Materials Sciences 97 - Energy 74H - Nuclear Warfare
Corporate Authors	Army Research Lab., Adelphi, MD.
Document Type	Technical Report
Title Note	Technical Report,01 Oct 2013,31 Dec 2015
NTIS Issue Number	201911