{gamma} spectroscopy of neutron irradiated {sup 241}Am samples

Journal Article · Mon Oct 26 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.56732· OSTI ID:21202255

Marie, F; Bolognese, T; Cribier, M; Fioni, G; Gunsing, F; Lelievre, F; Martino, J; Pluquet, A; Spiro, M ^[1]; Faust, H; Leconte, Ph; Oliver, R ^[2]

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1. DSM/DAPNIA-CEA Saclay-91191 Gif/Yvette-France (France)
2. Institut Laue Langevin-38000 Grenoble-France (France)

{sup 241}Am goes by neutron capture to the two {sup 242}Am states: the ground and the meta-stable. We have measured both thermal cross sections, with a relative uncertainty of 7%, by {gamma}-spectroscopy of neutron irradiated {sup 241}Am samples. The results are: {sigma}{sub c}{sup g.s.}={sigma}{sub c}({sup 241}Am(n{sub th},{gamma}){sup 242}Am{sup g.s.})=636{+-}46 barns and {sigma}{sub c}{sup m}={sigma}{sub c}({sup 241}Am(n{sub th},{gamma}){sup 242}Am{sup m})=60{+-}4 barns. These measurements lead to a ratio {sigma}{sub c}{sup g.s.}/{sigma}{sub c}{sup tot}=0.914{+-}0.007 with a total capture cross section {sigma}{sub c}{sup tot}=696{+-}48 barns. While the ratio is compatible with previous measurements, the total capture cross section {sigma}{sub c}{sup tot} is increased by 16% with respect to the JENDL-3.2 value.

• OSTI ID: 21202255
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 447; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMERICIUM 241
AMERICIUM 241 TARGET
AMERICIUM 242
CAPTURE
GAMMA SPECTROSCOPY
GROUND STATES
IRRADIATION
METASTABLE STATES
NEUTRON REACTIONS
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
SPALLATION
THERMAL NEUTRONS
TOTAL CROSS SECTIONS