Cross sections for neutron capture from surrogate measurements: An examination of Weisskopf-Ewing and ratio approximations

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024612· OSTI ID:21386615

Escher, Jutta E; Dietrich, Frank S ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

Motivated by the renewed interest in the surrogate nuclear reactions approach, an indirect method for determining compound-nuclear reaction cross sections, the prospects for determining (n,{gamma}) cross sections for deformed rare-earth and actinide nuclei are investigated. A nuclear reaction model is employed to simulate physical quantities that are typically measured in surrogate experiments and used to assess the validity of the Weisskopf-Ewing and ratio approximations, which are typically employed in the analysis of surrogate reactions. The expected accuracy of (n,{gamma}) cross sections extracted from typical surrogate measurements is discussed and limitations of the approximate methods are illustrated. Suggestions for moving beyond presently employed approximations are made.

• OSTI ID: 21386615
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ACTINIDE NUCLEI
APPROXIMATIONS
BARYON REACTIONS
CALCULATION METHODS
CAPTURE
CROSS SECTIONS
ELEMENTS
HADRON REACTIONS
HEAVY NUCLEI
METALS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
RARE EARTHS