Abstract
Neutron-nucleus cross sections calculated by macroscopic potentials are compared with a microscopic one to study the performance for long-lived fission products. The macroscopic potentials show a good agreement with the microscopic one at higher energies, where neutron experimental data are scarce. Besides it, analyses of differential elastic cross sections at low energies also suggest that the macroscopic potentials are still effective and applicable enough for the long-lived fission products.
Highlights
Phenomenological optical potential is known to be able to describe the nuclear scattering process well
We mainly pay attention to neutron-nucleus cross sections from En ∼ 65 MeV, where the approximations used in the Minomo potential appear to work well [2], to 200 MeV
We compared the results of the cross sections calculated by the phenomenological and the microscopic optical potentials
Summary
Phenomenological optical potential is known to be able to describe the nuclear scattering process well. Microscopic optical potentials will be used widely for nuclear data evaluations in the future, phenomenological one is still important and useful. We mainly pay attention to neutron-nucleus cross sections from En ∼ 65 MeV, where the approximations used in the Minomo potential appear to work well [2], to 200 MeV. Such an energy region is our interest because the largest ambiguity will arise from there since neutron cross section data at high energies are scarcer than at low energies in most nuclei.
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