The Electrostatic Screening of Nuclear Reactions in the Sun

Details The Electrostatic Screening of Nuclear Reactions in the Sun The Electrostatic Screening of Nuclear Reactions in the Sun

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...558..925s&link_type=abstract

The Astrophysical Journal, Volume 558, Issue 2, pp. 925-942.

Astronomy and Astrophysics

Astronomy

17

Nuclear Reactions, Nucleosynthesis, Abundances, Plasmas

Scientific paper

We apply the method of Shaviv & Shaviv to evaluate from first principles the plasma screening correction to the rate of nuclear reactions under conditions similar to those prevailing in the present-day Sun. We calculate the screening factor for the p-p chain and the CN cycle nuclear reactions. We find the following:1. The mean field approximation à la Debye-Hückel is not strictly valid under the conditions prevailing in the core of the Sun. A kinetic approach should be implemented.2. The mean energy exchange between any two scattering particles and the plasma is positive for low relative kinetic energies and negative for high relative kinetic energies. The turnover in a pure hydrogen plasma occurs at about Ekin-rel~2kT

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