Reduction of the neutron imaginary potential off the stability line and its possible impact on neutron capture rates

A. V. Voinov, K. Brandenburg, C. R. Brune, R. Giri, S. M. Grimes, T. Massey, Z. Meisel, S. N. Paneru, A. L. Richard, G. Perdikakis, A. Falduto

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of the isovector imaginary optical potential has been studied experimentally by using the particle-evaporation technique for the reaction with a 21.8 MeV beam. Spectra of neutron, proton, and particles emitted from the neutron-rich compound nucleus have been measured and analyzed with traditional optical model potentials with their original parametrizations as well as with adjusted isovector imaginary components. It is shown that the isovector component of the imaginary potential is indispensable in the reproduction of proton and -particle yields from this reaction and even needs to be enhanced compared with the suggestions of the original model parametrizations. This can lead to important consequences for astrophysical reaction-rate calculations.

Original languageEnglish
Article number015805
JournalPhysical Review C
Volume104
Issue number1
DOIs
StatePublished - Jul 2021

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