COLLECTIVE MODES OF EXCITATION IN DEFORMED NEUTRON-RICH Mg ISOTOPES

被引：9
|
作者：
Yoshida, Kenichi [1 ]
机构：
[1] RIKEN, Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510198, Japan
来源：
MODERN PHYSICS LETTERS A | 2010年 / 25卷 / 21-23期
关键词：
Exotic mode of excitation; neutron-rich Mg isotopes; Skyrme energy-density-functional approach;
D O I：
10.1142/S0217732310000320
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Giant resonances and the pygmy mode in neutron-rich Mg isotopes close to the drip line are investigated by means of the deformed Hartree-Fock-Bogoliubov and quasiparticle random-phase approximations using a Skyrme energy-density functional. It is found that the giant monopole resonance has a two-peak structure due to the deformation. The lower-energy resonance is generated associated with the mixing with the K(pi) - 0(+) component of the giant quadrupole resonance. We find for the negative-parity excitations that the pygmy dipole resonance appeared just above the threshold has a significant mixing effect among the isovector dipole, isoscalar octupole and compression dipole excitations.
引用
收藏
页码：1783 / 1786
页数：4
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