Neutron dominance in excited states of Mg 26 and Be 10 probed by proton and α inelastic scattering

Yoshiko Kanada-En'Yo, Yuki Shikata, Yohei Chiba, Kazuyuki Ogata

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6 Citations (Scopus)

Abstract

Isospin characters of nuclear excitations in Mg26 and Be10 are investigated via proton (p) and alpha (α) inelastic scattering. A structure model of antisymmetrized molecular dynamics (AMD) is applied to calculate the ground and excited states of Mg26 and Be10. The calculation describes the isoscalar feature of the ground-band 21+(Kπ=01+) excitation and predicts the neutron dominance of the side-band 22+(Kπ=2+) excitation in Mg26 and Be10. The p and α inelastic scattering off Mg26 and Be10 is calculated by microscopic coupled-channel (MCC) calculations with a g-matrix folding approach by using the matter and transition densities of the target nuclei calculated with AMD. The calculation reasonably reproduces the observed 01+,21+, and 22+ cross sections of Mg26+p scattering at incident energies Ep=24 and 40 MeV and of Mg26+α scattering at Eα=104 and 120 MeV. For Be10+p and Be10+α scattering, inelastic cross sections to the excited states in the Kπ=01+ ground, Kπ=2+ side, Kπ=02+ cluster, and Kπ=1- cluster bands are investigated. The isospin characters of excitations are investigated via inelastic scattering processes by comparison of the production rates in the Be10+p,Be10+α, and C10+p reactions. The result predicts that the 22+ state is selectively produced by the Be10+p reaction because of the neutron dominance in the 22+ excitation as in the case of the Mg26+p scattering to the 22+ state, whereas its production is significantly suppressed in the C10+p reaction.

Original languageEnglish
Article number014607
JournalPhysical Review C
Volume102
Issue number1
DOIs
Publication statusPublished - Jul 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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