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

Bonearu, L.*; Kawano, Toshihiko*; Watanabe, Takehito*; Chiba, Satoshi

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 $$^{116}$$Sn to $$^{124}$$Sn. The resulting DSD cross sections for the neutron capture by $$^{208}$$Pb and $$^{238}$$U are found to be in good agreement with the available experimental data. The calculations are also performed for the neutron capture on $$^{122}$$Sn and $$^{132}$$Sn isotopes that are important for ther-process in astrophysics.

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Category:Physics, Nuclear

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