β-delayed α spectrum of ${}^{16}N$ and the ${}^{12}C$ (α,γ $)^{16}$ O cross section at low energies

8 February 1993

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

Vol. 70 (6) , 726-729
https://doi.org/10.1103/physrevlett.70.726

Abstract

The α spectrum following the β decay of

{}^{16}N

from the isotope separator TISOL has been measured by detecting

10^{6}

α particles in coincidence with

{}^{12}C

nuclei. These data, which show a low-energy interference anomaly accompanying the main α peak, permit a more precise determination of the p-wave amplitude of the astrophysically important reaction

{}^{12}C

(α,γ

)^{16}

O. The α spectrum and previous γ-ray data have been fitted simultaneously by a K-matrix parametrization; a value of S(E=0.3 MeV)=57±13 keV b has been obtained for the E1 part of the

{}^{12}C

(α,γ

)^{16}

O reaction.

Keywords

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β-delayed α spectrum ofN16and theC12(α,γ)16O cross section at low energies

Abstract

Keywords

β-delayed α spectrum of ${}^{16}N$ and the ${}^{12}C$ (α,γ $)^{16}$ O cross section at low energies