Low-energy neutron interaction with even-even nuclei and coupled channel optical model
D.A. Zaikin - I.V. Surkova - M.V. Mordovskoy
Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
Received: 11 January 1999 Communicated by D. Schwalm
Abstract
We revised a description of low-energy neutron cross section data
for even-even spherical nuclei in terms of the coupled channel optical
model (CCOM). It is shown that two-phonon version of this model allows
to obtain a unified description of these data assuming slight changes
of nuclear diffuseness parameter for magic and near-magic nuclei.
Neutron strength functions and scattering lengths for even-even
spherical nuclei are also calculated using the same model. Results
of these calculations are in a good agreement with experimental
data. NpNn-systematics of inelastic neutron scattering on even-even
nuclei is proposed. This systematics combined with CCOM calculations
of neutron cross sections presents an additional method for finding
nuclei with semimagic numbers of nucleons.
PACS
24.10.Eq Coupled-channel and distorted wave models -
25.40.Fq Inelastic neutron scattering -
28.20.Cz Neutron scattering
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