Low-Energy Measurement of the ${}^{7}B e (p, γ) {}^{8}B$ Cross Section

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30 April 2001

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

Vol. 86 (18) , 3985-3988
https://doi.org/10.1103/physrevlett.86.3985

Abstract

We have measured the cross section of the

^{7} Be (p, γ)^{8} B

reaction for

E_{c . m .} = 185.8

, 134.7, and 111.7 keV using a radioactive

^{7} Be

target (132 mCi). Single and coincidence spectra of

β^{+}

and

α

particles from

^{8} B

and

^{8} {Be}^{*}

decay, respectively, were measured using a large acceptance spectrometer. The zero energy

S

factor inferred from these data is

18.5 \pm 2.4 eV b

and a weighted mean value of

18.8 \pm 1.7 eV b

(theoretical uncertainty included) is deduced when combining this value with our previous results at higher energies.

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