Splitting of ISGMR strength in the light-mass nucleus $^{24}$Mg due to ground-state deformation
Y. K. Gupta, U. Garg, J. T. Matta, D. Patel, T. Peach, J. Hoffman, 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. Yasuda, H., Akimune, T. Kawabata, and M.N. Harakeh
TL;DR
This study measures the ISGMR strength distribution in $^{24}$Mg, revealing a two-peak structure caused by ground-state deformation, and compares it with microscopic theoretical predictions.
Contribution
First experimental observation of two-peak ISGMR strength distribution in a light nucleus due to deformation, supported by microscopic theory.
Findings
Two-peak ISGMR structure observed in $^{24}$Mg
Splitting explained by prolate deformation
Agreement with microscopic theoretical models
Abstract
The isoscalar giant monopole resonance (ISGMR) strength distribution in Mg has been determined from background-free inelastic scattering of 386-MeV particles at extreme forward angles, including 0. The ISGMR strength distribution has been observed for the first time to have a two-peak structure in a light-mass nucleus. This splitting of ISGMR strength is explained well by microscopic theory in terms of the prolate deformation of the ground state of Mg.
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Taxonomy
TopicsNuclear physics research studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research