Measurement of the {sup 237}Np(n,{gamma}) cross section from 20 meV to 500 keV with a high efficiency, highly segmented 4{pi} BaF{sub 2} detector

Journal Article · Sat Mar 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.034309· OSTI ID:21189827

Esch, E -I; Bond, E M; Bredeweg, T A; Couture, A; Glover, S E; Haight, R C; Jandel, M; Kawano, T; Mertz, A; O'Donnell, J M; Rundberg, R S; Schwantes, J M; Ullmann, J L; Vieira, D J; Wilhelmy, J B; Wouters, J M ^[1]; Reifarth, R ^[1]; Greife, U; Hatarik, A M; Hatarik, R ^[2]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Colorado School of Mines, Golden, Colorado 80401 (United States)

The {sup 237}Np(n,{gamma}){sup 238}Np cross section has been measured in the neutron energy range from 20 meV to 500 keV using the DANCE array at the Los Alamos National Laboratory. This new facility allows experiments with submilligram samples and is therefore well suited to investigate isotopes with half-lives as low as a few hundred days. In this benchmark measurement, only 0.42 mg of {sup 237}Np was sufficient to determine differential cross sections relative to the well-known resonance at 0.5 eV. The thermal cross section was measured to {sigma}{sub 2200m/s}=177{+-}5 barn, {sigma}{sub kT=25.3meV}=167{+-}4 barn and the resonance integral to RI=693{+-}6 barn.

• OSTI ID: 21189827
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 77, Issue 3; Other Information: DOI: 10.1103/PhysRevC.77.034309; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARIUM FLUORIDES
BENCHMARKS
DIFFERENTIAL CROSS SECTIONS
EFFICIENCY
HALF-LIFE
KEV RANGE
LANL
MEV RANGE
NEPTUNIUM 237
NEPTUNIUM 238
NEUTRONS
RESONANCE
RESONANCE INTEGRALS