Ratio of the ${}^{4}{He} (γ, p)$ and ${}^{4}{He} (γ, n)$ Cross Sections

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27 March 1972

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

Vol. 28 (13) , 839-843
https://doi.org/10.1103/physrevlett.28.839

Abstract

The

{}^{4}{He} (γ, p) {}^{3}H

and

{}^{4}{He} (γ, n) {}^{3}{He}

cross sections have been determined with a magnetic spectrometer in the energy interval of 30.0 to 51.8 MeV. We find that the average value of

\frac{σ (γ, p)}{σ (γ, n)}

is 1.03±0.04 in the above energy interval. The

{}^{4}{He} (γ, p)

cross section decreases from 1.52±0.13 mb at 31.7 MeV to 0.36±0.03 mb at 51.8 MeV.

Keywords

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