New empirical formulae for the in-medium nucleon-nucleon cross-section

Nucleon-nucleon phase variation and in-medium effects on elastic scattering cross sections

“…The parameters V Y , W Y and α 2 of the Gaussian potential, equation (21), are used as free parameters to fit the measured NN scattering values of σ, ρ, and β NN [49,50]. The results of these calculations are given in table 4.…”

“…Theoretically, the medium NN cross section can be calculated by solving the many-body Bethe-Goldstone (BG) equation, namely G matrix cross section [13,14]. Many authors [15][16][17][18][19][20][21][22] have studied medium effect of NN cross section. Based upon the Bonn A NN interactive potential and Dirac-Brueckner approach for nuclear matter, in-medium NN cross sections were calculated by Li and Machleidt [15,16] for the incident energies from 50 to 300 MeV in a laboratory frame.…”