Threshold Resonant Structure of the 232Th Neutron-Induced Fission Cross Section

Details Threshold Resonant Structure of the 232Th Neutron-Induced Fission Cross Section Threshold Resonant Structure of the 232Th Neutron-Induced Fission Cross Section

2007-08-08

arxiv.org/abs/0708.1094v1

Physics

Nuclear Physics

Nuclear Theory

17 pages 11 figures

Scientific paper

The structures observed in the sub-threshold neutron-induced fission of ^{232}Th were investigated employing a recent developed model. Theoretical single-particle excitations of a phenomenological two-humped barrier are determined by solving a system of coupled differential equations for the motion along the optimal fission path. A rather good agreement with experimental data was obtained using a small number of independent parameters. It is predicted that the structure at 1.4 and 1.6 MeV is mainly dominated by spin 3/2 partial cross-section with small admixture of spin 1/2, while the structure at 1.7 MeV is given by a large partial cross section of spin 5/2.

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