Systematic investigation of low-lying dipole modes using the canonical-basis time-dependent Hartree-Fock-Bogoliubov theory

被引：60

作者：

Ebata, Shuichiro ^{[1
,2
,3
]}

Nakatsukasa, Takashi ^{[3
,4
]}

Inakura, Tsunenori ^{[3
,5
]}

机构：

[1] Hokkaido Univ, Meme Media Lab, Sapporo, Hokkaido 0600813, Japan

[2] Univ Tokyo, Ctr Nucl Study, Wako, Saitama 3510198, Japan

[3] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan

[4] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058571, Japan

[5] Chiba Univ, Grad Sch Sci, Dept Phys, Chiba 2638522, Japan

来源：

PHYSICAL REVIEW C | 2014年 / 90卷 / 02期

关键词：

RESONANT PHOTON SCATTERING; NUCLEI; NEUTRON; STATES; EXCITATIONS; ISOTOPES; FORCE;

D O I：

10.1103/PhysRevC.90.024303

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：

Systematic investigations of the electric dipole (E1) modes of excitation are performed using the canonical-basis time-dependent Hartree-Fock-Bogoliubov (Cb-TDHFB) theory. The Cb-TDHFB is able to describe dynamical pairing correlations in excited states of nuclear systems. We apply the method to the real-time calculation of linear response in even-even nuclei with Skyrme functionals. Effects of shell structure, neutron skin, deformation, and neutron chemical potential (separation energy) are studied in a systematic way. This reveals a number of characteristic features of the low-energy E1 modes. We also find a universal behavior in the low-energy E1 modes for heavy neutron-rich isotopes, which suggests the emergence of decoupled E1 peaks beyond N = 82.

引用

页数：18

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