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Title: Critical enhancement of the in-medium nucleon-nucleon cross section at low temperatures

Abstract

The in-medium nucleon-nucleon cross section is calculated starting from the thermodynamic [ital 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 [ital N]-[ital 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.

Authors:
;  [1];  [2]
  1. (Arbeitsgruppe der Max-Planck-Gesellschaft Theoretische Vielteilchenphysik'' an der Universitaet Rostock, Universitaetsplatz 1, 18051 (Germany))
  2. (Institut fuer Ostseeforschung, Seestr. 15, 18119 Rostock-Warnemuende (Germany))
Publication Date:
OSTI Identifier:
7033111
Alternate Identifier(s):
OSTI ID: 7033111
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (United States)
Additional Journal Information:
Journal Volume: 50:1; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CROSS SECTIONS; ENERGY DEPENDENCE; TEMPERATURE DEPENDENCE; NUCLEON-NUCLEON INTERACTIONS; BETHE-SALPETER EQUATION; ELASTIC SCATTERING; NUCLEAR MATTER; NUCLEON-NUCLEON POTENTIAL; S MATRIX; SUPERFLUIDITY; BARYON-BARYON INTERACTIONS; EQUATIONS; HADRON-HADRON INTERACTIONS; INTERACTIONS; MATRICES; MATTER; PARTICLE INTERACTIONS; POTENTIALS; SCATTERING 663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-); 663450 -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)

Citation Formats

Alm, T., Roepke, G., and Schmidt, M. Critical enhancement of the in-medium nucleon-nucleon cross section at low temperatures. United States: N. p., 1994. Web. doi:10.1103/PhysRevC.50.31.
Alm, T., Roepke, G., & Schmidt, M. Critical enhancement of the in-medium nucleon-nucleon cross section at low temperatures. United States. doi:10.1103/PhysRevC.50.31.
Alm, T., Roepke, G., and Schmidt, M. Fri . "Critical enhancement of the in-medium nucleon-nucleon cross section at low temperatures". United States. doi:10.1103/PhysRevC.50.31.
@article{osti_7033111,
title = {Critical enhancement of the in-medium nucleon-nucleon cross section at low temperatures},
author = {Alm, T. and Roepke, G. and Schmidt, M.},
abstractNote = {The in-medium nucleon-nucleon cross section is calculated starting from the thermodynamic [ital 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 [ital N]-[ital 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.},
doi = {10.1103/PhysRevC.50.31},
journal = {Physical Review, C (Nuclear Physics); (United States)},
issn = {0556-2813},
number = ,
volume = 50:1,
place = {United States},
year = {1994},
month = {7}
}