Nuclear fragmentation and charge-exchange reactions induced by pions in the Δ-resonance region

被引：16

作者：

Feng, Zhao-Qing ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

来源：

PHYSICAL REVIEW C | 2016年 / 94卷 / 05期

基金：

中国国家自然科学基金;

关键词：

TRANSPORT MODEL; INELASTIC-SCATTERING; SYSTEMATICS; COLLISIONS; EMISSION; ENERGY; MATTER; PI+;

D O I：

10.1103/PhysRevC.94.054617

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 dynamics of the nuclear fragmentations and the charge exchange reactions in pion-nucleus collisions near the Delta (1232) resonance energies has been investigated within the Lanzhou quantum molecular dynamics transport model. An isospin-, momentum-, and density-dependent pion-nucleon potential is implemented in the model, which influences the pion dynamics, in particular the kinetic energy spectra, but weakly impacts the fragmentation mechanism. The absorption process in pion-nucleon collisions to form the Delta (1232) resonance dominates the heating mechanism of the target nucleus. The excitation energy transferred to the target nucleus increases with the pion kinetic energy and is similar for both pi(-)- and pi(+)-induced reactions. The magnitude of fragmentation of the target nucleus weakly depends on the pion energy. The isospin ratio in the pion double-charge exchange is influenced by the isospin ingredient of target nucleus.

引用

页数：9

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