Screening in thermonuclear reaction rates in the sun

Andrei V. Gruzinov; John N. Bahcall

doi:10.1086/306116

Screening in thermonuclear reaction rates in the sun

Andrei V. Gruzinov, John N. Bahcall

Research output: Contribution to journal › Article › peer-review

Abstract

We evaluate the effect of electrostatic screening by ions and electrons on low-Z thermonuclear reactions in the Sun. We use a mean field formalism and calculate the electron density of the screening cloud using the appropriate density matrix equation of quantum statistical mechanics. Because of well-understood physical effects that are included for the first time in our treatment, the calculated enhancement of reaction rates does not agree with the frequently used interpolation formulae. Our result does agree, within small uncertainties, with Salpeter's weak screening formula. If weak screening is used instead of the commonly employed screening prescription of Graboske et al., the predicted ⁸B neutrino flux is increased by 7% and the predicted chlorine rate is increased by 0.4 SNU.

Original language	English (US)
Pages (from-to)	996-1001
Number of pages	6
Journal	Astrophysical Journal
Volume	504
Issue number	2 PART I
DOIs	https://doi.org/10.1086/306116
State	Published - 1998

Keywords

Nuclear reactions, nucleosynthesis, abundances
Sun: abundances
Sun: interior

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/306116

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title = "Screening in thermonuclear reaction rates in the sun",

abstract = "We evaluate the effect of electrostatic screening by ions and electrons on low-Z thermonuclear reactions in the Sun. We use a mean field formalism and calculate the electron density of the screening cloud using the appropriate density matrix equation of quantum statistical mechanics. Because of well-understood physical effects that are included for the first time in our treatment, the calculated enhancement of reaction rates does not agree with the frequently used interpolation formulae. Our result does agree, within small uncertainties, with Salpeter's weak screening formula. If weak screening is used instead of the commonly employed screening prescription of Graboske et al., the predicted 8B neutrino flux is increased by 7% and the predicted chlorine rate is increased by 0.4 SNU.",

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AU - Gruzinov, Andrei V.

AU - Bahcall, John N.

PY - 1998

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N2 - We evaluate the effect of electrostatic screening by ions and electrons on low-Z thermonuclear reactions in the Sun. We use a mean field formalism and calculate the electron density of the screening cloud using the appropriate density matrix equation of quantum statistical mechanics. Because of well-understood physical effects that are included for the first time in our treatment, the calculated enhancement of reaction rates does not agree with the frequently used interpolation formulae. Our result does agree, within small uncertainties, with Salpeter's weak screening formula. If weak screening is used instead of the commonly employed screening prescription of Graboske et al., the predicted 8B neutrino flux is increased by 7% and the predicted chlorine rate is increased by 0.4 SNU.

AB - We evaluate the effect of electrostatic screening by ions and electrons on low-Z thermonuclear reactions in the Sun. We use a mean field formalism and calculate the electron density of the screening cloud using the appropriate density matrix equation of quantum statistical mechanics. Because of well-understood physical effects that are included for the first time in our treatment, the calculated enhancement of reaction rates does not agree with the frequently used interpolation formulae. Our result does agree, within small uncertainties, with Salpeter's weak screening formula. If weak screening is used instead of the commonly employed screening prescription of Graboske et al., the predicted 8B neutrino flux is increased by 7% and the predicted chlorine rate is increased by 0.4 SNU.

KW - Nuclear reactions, nucleosynthesis, abundances

KW - Sun: abundances

KW - Sun: interior

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JO - Astrophysical Journal

JF - Astrophysical Journal

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Screening in thermonuclear reaction rates in the sun

Abstract

Keywords

ASJC Scopus subject areas

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