Polarized proton capture by deuterium and the ${}^{2}H (p, γ) {}^{3}{He}$ astrophysical $S$ factor

1 October 1995

journal article
research article
Published by American Physical Society (APS) in Physical Review C

Vol. 52 (4) , R1732-R1735
https://doi.org/10.1103/physrevc.52.r1732

Abstract

The

{}^{2}H (\vec{p}, γ) {}^{3}{He}

reaction has been studied in the energy region

E_{p} = 80 - 0

keV (

E_{c . m .} = 53.3 - 0

keV), where the quantities measured were

σ (θ, E)

and

A_{y} (θ, E)

. Our result for the total

{}^{2}H (p, γ) {}^{3}{He}

S

factor at

E = 0

S (0) = 0.121 \pm 0.012

eV b (including systematic error), which is 52% lower than the presently accepted value. Some astrophysical aspects of this result are discussed. We have also extracted the

E 1

and

M 1

S (E)

components using our detailed angular distribution data. These data will provide sensitive tests for three-body calculations which include Coulomb and meson exchange current effects.

Keywords

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Polarized proton capture by deuterium and theH2(p, γ)He3astrophysicalSfactor

Abstract

Keywords

Polarized proton capture by deuterium and the ${}^{2}H (p, γ) {}^{3}{He}$ astrophysical $S$ factor