Microscopic analysis of the ${}^{13}C$ (α,n $)^{16}$ O and ${}^{13}C$ (α,α $)^{13}$ C reactions

Publisher Website

1 December 1987

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

Vol. 36 (6) , 2206-2211
https://doi.org/10.1103/physrevc.36.2206

Abstract

The

{}^{13}C

(α,n

)^{16}

O and

{}^{13}C

(α,α

)^{13}

C reactions are investigated through the generator-coordinate method. Two bands with marked α

+^{13}

C structure are found in the

{}^{17}O

spectrum. Experimental candidates are proposed. The microscopic

{}^{13}C

(α,α

)^{13}

C cross sections are in fair agreement with experimental data. We show that the

{}^{13}C

(α,n

)^{16}

O cross section at stellar energies is strongly affected by the 1/2

{}_{2}^{+}

(6.36 MeV) weakly bound state. The astrophysical S factor below

E_{c . m . = 0.3}

MeV is therefore significantly enhanced with respect to the extrapolations used for astrophysical purposes.

Keywords

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