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

页码：31 / 37

页数：7

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