Deformation effects on isoscalar giant resonances in Mg 24

Y. K. Gupta, U. Garg, J. Hoffman, J. Matta, P. V.Madhusudhana Rao, D. Patel, T. Peach, K. Yoshida, M. Itoh, M. Fujiwara, K. Hara, H. Hashimoto, K. Nakanishi, M. Yosoi, H. Sakaguchi, S. Terashima, S. Kishi, T. Murakami, M. Uchida, Y. YasudaH. Akimune, T. Kawabata, M. N. Harakeh

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13 Citations (Scopus)

Abstract

Strength distributions for isoscalar giant resonances with multipolarity L≤2 have been determined in Mg24 from "instrumental background-free" inelastic scattering of 386-MeV α particles at extreme forward angles, including 0. The isoscalar E0, E1, and E2 strengths are observed to be 57±7%, 111.1-7.2+10.9%, and 148.6±7.3%, respectively, of their energy-weighted sum rules in the excitation energy range of 6 to 35 MeV. The isoscalar giant monopole (ISGMR) and quadrupole (ISGQR) resonances exhibit a prominent K splitting which is consistent with microscopic theory for a prolate-deformed ground state of Mg24. For the ISGQR it is due to splitting of the three K components, whereas for the ISGMR it is due to its coupling to the K=0 component of the ISGQR. Deformation effects on the isoscalar giant dipole resonance are less pronounced, however.

Original languageEnglish
Article number044324
JournalPhysical Review C
Volume93
Issue number4
DOIs
Publication statusPublished - 2016 Apr 21

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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