Compressional-mode resonances in the molybdenum isotopes: Emergence of softness in open-shell nuclei near A = 90
Compressional-mode resonances in the molybdenum isotopes: Emergence of softness in open-shell nuclei near A = 90
复制标题
钼同位素的压缩模式共振:A = 90 附近开壳核中出现柔软性
DOI:
10.1016/j.physletb.2020.135608
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发表时间:
2020
影响因子:
4.4
通讯作者:
Ishibashi, Y.
中科院分区:
文献类型:
--
作者:
Howard, K.B.;Garg, U.;Itoh, M.;Akimune, H.;Fujiwara, M.;Furuno, T.;Gupta, Y.K.;Harakeh, M.N.;Inaba, K.;Ishibashi, Y.
Abstract “Why are the tin isotopes soft?” has remained, for the past decade, an open problem in nuclear structure physics: models which reproduce the isoscalar giant monopole resonance (ISGMR) in the “doubly-closed shell” nuclei, 90 Zr and 208 Pb, overestimate the ISGMR energies of the open-shell tin and cadmium nuclei, by as much as 1 MeV. In an effort to shed some light onto this problem, we present results of detailed studies of the ISGMR in the molybdenum nuclei, with the goal of elucidating where–and how–the softness manifests itself between 90 Zr and the cadmium and tin isotopes. The experiment was conducted using the 94, 96, 98,100 Mo (α, α′) reaction at E α= 386 MeV. A comparison of the results with relativistic, self-consistent Random-Phase Approximation calculations indicates that the ISGMR response begins to show softness in the molybdenum isotopes beginning with A= 92.
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DOI:
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2009
期刊:
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通讯作者:
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