Effects of collective modes on shell structure of 10Be and 24O core

被引：16
|
作者：
Colò, G
Suzuki, T
Sagawa, H
机构：
[1] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[2] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
[3] Nihon Univ, Coll Humanities & Sci, Dept Phys, Setagaya Ku, Tokyo 156, Japan
[4] Univ Aizu, Ctr Math Sci, Fukushima 9658580, Japan
来源：
NUCLEAR PHYSICS A | 2001年 / 695卷
关键词：
magic numbers; particle-vibration coupling; collective states;
D O I：
10.1016/S0375-9474(01)01103-4
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：
We study the effects of collective modes on shell structure in nuclei near the neutron drip line close to Be-10 and O-24. Energy shifts in sin.-le-particle energies are evaluated by a particle-vibration coupling model. In the case of the Be-10 core, the Coupling to 2(+) states is found to reduce the shell gap between 2s(1/2) and 1P(1/2) states. ln the case of the O-24 core, the couplings to 3(-) and 2(+) states lead to a large energy gap between 2s(1/2) and 1d(3/2) states, in agreement with a recent experimental evidence of a new magic number at N = 16 near the neutron drip line. In particular, the 3- vibrations are found to play a crucial role to push down the energy of the 2s(1/2) state. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：167 / 176
页数：10
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