It has been shown by Galitskii and Yakimets that in a dense plasma, like the stellar core, the tunneling particles undergo simultaneous collisions with other particles and, due to quantum uncertainty effects, the particles distribution function over momenta acquires a non-Maxwellian power-like tail even under thermodynamic equilibrium. We show that these many-body effects imply a strongly modification of the nuclear CNO reaction rates which are, however, strongly modulated by taking into account the correct non-extensive thermostatistical framework when memory effects and long range force are not negligible. These statistical features match the plasma characteristic of weak non-ideal stellar plasma like solar interior.
Modified CNO nuclear reaction rates in dense stellar plasma
GERVINO, Gianpiero;
2001-01-01
Abstract
It has been shown by Galitskii and Yakimets that in a dense plasma, like the stellar core, the tunneling particles undergo simultaneous collisions with other particles and, due to quantum uncertainty effects, the particles distribution function over momenta acquires a non-Maxwellian power-like tail even under thermodynamic equilibrium. We show that these many-body effects imply a strongly modification of the nuclear CNO reaction rates which are, however, strongly modulated by taking into account the correct non-extensive thermostatistical framework when memory effects and long range force are not negligible. These statistical features match the plasma characteristic of weak non-ideal stellar plasma like solar interior.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.