Year: 2001
Type: conference-paper
Abstract: Energy and momentum of the elementary excitations become independent variables in medium: energy and momentum statistical distributions are not identical. The momentum distribution and not the energy distribution is relevant for barrier penetration. The deviations of the momentum distribution from the Maxwell-Boltzmann energy distribution can be expressed in terms of the imaginary part of the self-energy of the quasi-particle. It is possible to obtain an effective Tsallis' distribution for the kinetic energy. These effects are different from static or dynamical screening and can have important consequences for reaction rates in stars.
Authors: M. CORADDU, M. LISSIA, G. MEZZORANI, P. QUARATI
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1986726069