Deformation effects on isoscalar giant resonances in 24Mg
Deformation effects on isoscalar giant resonances in 24Mg
复制标题
变形对 24Mg 等标量巨共振的影响
DOI：
10.1103/physrevc.93.044324
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发表时间：
2016
影响因子：
3.1
通讯作者：
T. Murakami et al.
中科院分区：
文献类型：
--
作者：
Y.K. Gupta;T. Murakami et al.
本文用386 MeV粒子在极端前向角下的“无仪器背景”非弹性散射，确定了具有多极性的等密度巨共振的强度分布。在6 ~ 35 MeV的激发能量范围内，观测到它们的能量加权和规则的等振幅和强度分别为、和。的Isoscillator巨磁共振（ISGMR）和四极共振（ISGQR）表现出一个顺应分裂，这是一致的扁长形变基态的微观理论。对于ISGQR，这是由于三个分量的分裂，而对于ISGMR，这是由于其耦合到ISGQR的分量。然而，形变对等密度巨偶极共振的影响不太明显。
Strength distributions for isoscalar giant resonances with multipolarityhave been determined infrom “instrumental background-free” inelastic scattering of 386-MeVparticles at extreme forward angles, including. The isoscalar, andstrengths are observed to be, and, 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 prominentsplitting which is consistent with microscopic theory for a prolate-deformed ground state of. For the ISGQR it is due to splitting of the threecomponents, whereas for the ISGMR it is due to its coupling to thecomponent of the ISGQR. Deformation effects on the isoscalar giant dipole resonance are less pronounced, however.