Effects of nuclear structure in double charge exchange reactions on 16O and 40Ca

被引：0
|
作者：
Wu, HC [1 ]
Gibbs, WR
机构：
[1] Univ Antioquia, Dept Fis, Medellin AA 1226, Colombia
[2] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA
来源：
ACTA PHYSICA HUNGARICA NEW SERIES-HEAVY ION PHYSICS | 2002年 / 16卷 / 1-4期
关键词：
nuclear structure; DCX reaction;
D O I：
10.1556/APH.16.2002.1-4.47
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 energy dependence of forward double charge exchange (DCX) reaction is studied for the doubly closed shell nuclei O-16 and Ca-40. A common characteristic of the two DCX reactions is a resonance-like peak around 50 MeV pion lab energy. While some authors have interpreted this peak as the evidence of a dibaryon resonance state, we show that it arises naturally in a two-step process in the conventional pion-nucleon system with proper handling of nuclear structure. The effects of nuclear structure are demonstrated through a comparison among different nuclear structure models: the symmetry model SU(4) circle times SU(3), the single particle shell model and the "realistic" shell model.
引用
收藏
页码：447 / 455
页数：9
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