Nuclear Reaction Rates in a Plasma: The Effect of Highly Damped Modes

Details Nuclear Reaction Rates in a Plasma: The Effect of Highly Damped Modes Nuclear Reaction Rates in a Plasma: The Effect of Highly Damped Modes

2000-06-22

arxiv.org/abs/astro-ph/0006326v1

Astronomy and Astrophysics

Astrophysics

10 pages, 4 figures

Scientific paper

The fluctuation-dissipation theorem is used to evaluate the screening factor of nuclear reactions due to the electromagnetic fluctuations in a plasma. We show that the commonly used Saltpeter factor is obtained if only fluctuations near the plasma eigenfrequency are assumed to be important (\omega \sim \omega_{pe}\ll T (\hbar=k_{B}=1)). By taking into account all the fluctuations, the highly damped ones, with \omega >\omega_{pe}, as well as those with \omega\leq\omega_{pe}, we find that nuclear reaction rates are higher than those obtained using the Saltpeter factor, for many interesting plasmas.

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