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Multichannel study of the $^{13}C(\alpha,n)^{16}$O and $^{16}O(n,\gamma)^{17}$O reactions

Abstract : The $^{13}C(\alpha,n)^{16}O reaction is investigated in a microscopic two-cluster model with an effective interaction recently developed for transfer reactions. The wave functions are defined in the generator coordinate method. The basis includes all $^{13}C+\alpha$ and $^{16}O+n$ channels with $^{13}$C and $^{16}$O described in the p shell. Particle-hole excitations in the sd shell are also taken into account in order to include the $^{16}O(3^-)+n$ channel. The $^{17}$O spectroscopy is in good agreement with experiment. In particular, the width of the astrophysically relevant 1/2_2^+ state is well reproduced (\Gamma =121 keV as compared to the experimental value \Gamma =124±12 keV). The calculation of the $^{13}C(\alpha,n)^{16}$O S factor shows the importance of the 3/2_3^+ resonance, and provides $S(0.2 MeV)=2.1×10^6$ MeV b, slightly lower than the NACRE recommended value (2.5×10^6 MeV b). The same model is applied to the $^{16}O(n,\gamma)^{17}$O radiative-capture reaction at thermal and astrophysical energies.
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http://hal.in2p3.fr/in2p3-00171969
Contributor : Béatrice Forrler <>
Submitted on : Thursday, September 13, 2007 - 4:03:08 PM
Last modification on : Thursday, June 4, 2020 - 10:24:03 AM

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M. Dufour, P. Descouvemont. Multichannel study of the $^{13}C(\alpha,n)^{16}$O and $^{16}O(n,\gamma)^{17}$O reactions. Physical Review C, American Physical Society, 2005, 72, pp.015801. ⟨10.1103/PhysRevC.72.015801⟩. ⟨in2p3-00171969⟩

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