Structure and decay of the pygmy dipole resonance in 26Ne

被引：18

作者：

Kimura, M. ^{[1
,2
]}

机构：

[1] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan

[2] Hokkaido Univ, Nucl React Data Ctr, Fac Sci, Sapporo, Hokkaido 0600810, Japan

来源：

PHYSICAL REVIEW C | 2017年 / 95卷 / 03期

关键词：

NUCLEAR-STRUCTURE; NE ISOTOPES; MEAN-FIELD; NEUTRON; EXCITATION; STABILITY; DYNAMICS; FISSION; STATES;

D O I：

10.1103/PhysRevC.95.034331

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The low-lying spectra of Ne-24,Ne-25,Ne-26 and the structure of the pygmy dipole resonance (PDR) in Ne-26 have been theoretically studied by the antisymmetrized molecular dynamics (AMD) and its extended version called shifted-basis AMD. The calculated energy and strength of the PDR reasonably agree with the observation, and the analysis of the wave function shows that the PDR is dominated by neutron excitation coupled to the quadrupole excited core nucleus Ne-25, which explains the observed unexpected decay of PDR to the excited states of Ne-25. The large isoscalar component of PDR is also shown and the enhancement of the core excitation in neutron-rich Ne isotopes is conjectured.

引用

页数：15

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