Kinetics of stimulated Moessbauer emission in neutron-pumped krypton-83

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Using an idealized kinetic model for a gamma-ray laser system pumped by a spatially uniform delta-function burst of fast neutrons, a computer study has been made of the growth, decay, and attenuation of resonant 9.3-keV recoil-less gamma radiation from /sup 83/Kr, as a function of neutron-burst intensity, gamma-ray linebreadth, temperature, dilution of krypton in a beryllium host, and nonresonant absorption coefficient of the host. The isomer is formed by neutron capture in a 40-eV resonance, and the 144-ns transition lifetime is short in comparison with the time for neutrons to moderate. The kinetic behavior of this system is therefore determined ... continued below

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Pages: 41

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Baldwin, G.C. & McNeil, L.E. November 1, 1977.

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Description

Using an idealized kinetic model for a gamma-ray laser system pumped by a spatially uniform delta-function burst of fast neutrons, a computer study has been made of the growth, decay, and attenuation of resonant 9.3-keV recoil-less gamma radiation from /sup 83/Kr, as a function of neutron-burst intensity, gamma-ray linebreadth, temperature, dilution of krypton in a beryllium host, and nonresonant absorption coefficient of the host. The isomer is formed by neutron capture in a 40-eV resonance, and the 144-ns transition lifetime is short in comparison with the time for neutrons to moderate. The kinetic behavior of this system is therefore determined largely by the time dependence of the neutron spectrum and only slightly by the reciprocal linebreadth of the graser transition. Because the lower state is stable, inversion is rapidly lost, so that, for observable gain, an unrealistically high source intensity is needed. Use of a beryllium host, which increases the Debye temperature, is negated by its parasitic absorption. Although this transition is unsuitable for a graser, these findings help to illustrate useful properties of nuclear isomers and solid hosts for which stimulated emission might be observable.

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Pages: 41

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Dep. NTIS, PC A03/MF A01.

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  • Report No.: LA-7004-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/5268105 | External Link
  • Office of Scientific & Technical Information Report Number: 5268105
  • Archival Resource Key: ark:/67531/metadc1066497

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • November 1, 1977

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 4, 2018, 1:08 p.m.

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Baldwin, G.C. & McNeil, L.E. Kinetics of stimulated Moessbauer emission in neutron-pumped krypton-83, report, November 1, 1977; United States. (digital.library.unt.edu/ark:/67531/metadc1066497/: accessed April 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.