Screening in Thermonuclear Reaction Rates in the Sun | Zendy

Andrei Gruzinov | Zendy; John N. Bahcall | Zendy

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Screening in Thermonuclear Reaction Rates in the Sun

Author(s) -

Andrei Gruzinov,

John N. Bahcall

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/306116

Subject(s) - physics , thermonuclear fusion , electron , formalism (music) , screening effect , ion , atomic physics , plasma , nuclear physics , quantum mechanics , art , musical , visual arts

We evaluate the effect of electrostatic screening by ions and electrons onlow-Z thermonuclear reactions in the sun. We use a mean field formalism andcalculate the electron density of the screening cloud using the appropriatedensity matrix equation of quantum statistical mechanics. Because of wellunderstood physical effects that are included for the first time in ourtreatment, the calculated enhancement of reaction rates does not agree with thefrequently used interpolation formulae. Our result does agree, within smalluncertainties, with Salpeter's weak screening formula. If weak screening isused instead of the commonly employed screening prescription of Graboske etal., the predicted $^8$B neutrino flux is increased by 7% and the predictedchlorine rate is increased by 0.4 SNU.Comment: 15 pages, 1 figure, submitted to ApJ. Acknowledgments, a footnote, and an explanation added. Additional information at www.sns.ias.edu/~jn

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