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A Study of Resonances in the Sub-Coulomb 12C-12C Reaction from the Viewpoint of Nuclear Molecule

1978; Oxford University Press; Volume: 59; Issue: 2 Linguagem: Inglês

10.1143/ptp.59.465

1347-4081

Yasuko Kondo, T. Matsuse, Yasuhisa Abe,

Nuclear Physics and Applications

The resonances in the sub-Coulomb 12C-12C total reaction cross section are analyzed by a simple potential model. There exists a 2+ potential resonance in the elastic channel at about 6.3 MeV and at the same time other structures which strongly couple to the elastic channel and share the resonance strength. As the structures, we introduce the intrinsic excited nuclear molecular configurations, i.e., bound or quasibound states in inelastic channels. We include all the components up to the excitation of both the carbon nuclei to the first excited state (21+, 4.44 MeV) but with potential depth depending on channel and use a weak absorption potential. It is shown that this model can reproduce the characteristic features of the total reaction cross section, i.e., width, peak height and level density of the resonances and the energy dependence of the total reaction cross section at the same time. This means that "absorption under the barrier" is not necessary to be introduced.