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

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.31· OSTI ID:7033111

Alm, T; Roepke, G ^[1]; Schmidt, M ^[2]

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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)

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.

• OSTI ID: 7033111
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 50:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

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-)