Calculation of delayed-neutron energy spectra in a quasiparticle random-phase approximation-Hauser-Feshbach model

Journal Article · Sat Nov 15 00:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.054601· OSTI ID:21199373

Kawano, T; Moeller, P; Wilson, W B ^[1]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Theoretical {beta}-delayed-neutron spectra are calculated based on the Quasiparticle Random-Phase Approximation (QRPA) and the Hauser-Feshbach statistical model. Neutron emissions from an excited daughter nucleus after {beta} decay to the granddaughter residual are more accurately calculated than in previous evaluations, including all the microscopic nuclear structure information, such as a Gamow-Teller strength distribution and discrete states in the granddaughter. The calculated delayed-neutron spectra agree reasonably well with those evaluations in the ENDF decay library, which are based on experimental data. The model was adopted to generate the delayed-neutron spectra for all 271 precursors.

• OSTI ID: 21199373
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 5; Other Information: DOI: 10.1103/PhysRevC.78.054601; (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
BETA DECAY
DAUGHTER PRODUCTS
DELAYED NEUTRONS
DISTRIBUTION
ENERGY SPECTRA
EVALUATION
EXCITED STATES
GAMOW-TELLER RULES
HAUSER-FESHBACH THEORY
LIBRARIES
NEUTRON EMISSION
NUCLEAR DATA COLLECTIONS
NUCLEAR STRUCTURE
NUCLEI
PRECURSOR
RANDOM PHASE APPROXIMATION
STATISTICAL MODELS