Nucleon direct-semidirect radiative capture with Skyrme-Hartree-Fock-BCS bound states

Journal Article · Tue May 15 00:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.054618· OSTI ID:20995304

Bonneau, L; Kawano, T ^[1]; Watanabe, T ^[1]; Chiba, S ^[2]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)

The nucleon direct-semidirect (DSD) capture cross sections are obtained by calculating a transition amplitude to the Hartree-Fock-BCS bound states. The radial matrix elements in the DSD amplitudes are calculated from the radial part of the single-particle wave functions. For deformed nuclei the single-particle states are expanded in the cylindrical harmonic-oscillator basis and then projected on the spherical harmonic-oscillator basis. The pairing correlations are treated in the BCS approach and the calculated spectroscopic factors are in fairly good agreement with experimental data in the even tin isotopes from {sup 116}Sn to {sup 124}Sn. The resulting DSD cross sections for the neutron capture by {sup 208}Pb and {sup 238}U are found to be in good agreement with the available experimental data. The calculations are also performed for the neutron capture on {sup 122}Sn and {sup 132}Sn isotopes that are important for the r-process in astrophysics.

• OSTI ID: 20995304
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 75, Issue 5; Other Information: DOI: 10.1103/PhysRevC.75.054618; (c) 2007 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
BOUND STATE
CAPTURE
CROSS SECTIONS
CYLINDRICAL CONFIGURATION
DEFORMED NUCLEI
HARMONIC OSCILLATORS
HARTREE-FOCK METHOD
LEAD 208
MATRIX ELEMENTS
NEUTRON REACTIONS
NUCLEONS
R PROCESS
SKYRME POTENTIAL
SPECTROSCOPIC FACTORS
TIN 116
TIN 122
TIN 124
TIN 132
TRANSITION AMPLITUDES
URANIUM 238