CRITICAL ENHANCEMENT OF THE IN-MEDIUM NUCLEON-NUCLEON CROSS-SECTION AT LOW-TEMPERATURES

被引：64
|
作者：
ALM, T [1 ]
ROPKE, G [1 ]
SCHMIDT, M [1 ]
机构：
[1] INST OSTEEFORSCH, D-18119 ROSTOCK, GERMANY
来源：
PHYSICAL REVIEW C | 1994年 / 50卷 / 01期
关键词：
D O I：
10.1103/PhysRevC.50.31
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 in-medium nucleon-nucleon cross section is calculated starting from the thermodynamic T matrix at finite temperatures. The corresponding Bethe-Salpeter equation is solved using a separable representation of the Paris nucleon-nucleon potential. The energy-dependent in-medium N-N cross section at a given density shows a strong temperature dependence. Especially at low temperatures and low total momenta, the in-medium cross section is strongly modified by in-medium effects. In particular, with decreasing temperature an enhancement near the Fermi energy is observed. This enhancement can be discussed as a precursor of the superfluid phase transition in nuclear matter.
引用
收藏
页码：31 / 37
页数：7
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