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

页码：447 / 455

页数：9

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