Abstract
The absolute average cross section 〈σ〉 of the14N(n, p)14C reaction has been measured using neutron spectra that closely resemble Maxwell-Boltzmann distributions with thermal energies of kT=25.0 and 52.4 keV: 〈σ〉=0.81±0.05 and 0.52±0.06 mb, respectively. The resulting reaction rates are nearly the same at T9=0.29 and 0.61, and their average, NA〈συ〉=(1.3±0.1)×105 cm3 s−1 mol−1, is about a factor of three smaller than the previously adopted values obtained by extrapolation between thermal and higher-energy data. Thus, the14N(n, p)14C reaction plays a correspondingly smaller role as a neutron poison fors-process nucleosynthesis.
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Supported in part by the Deutsche Forschungsgemeinschaft (Ro 429/15-2)
On leave from the Institute of Nuclear Studies, Swierk, Poland
The authors would like to thank A. Jorissen and M. Arnould (Bruxelles) for fruitful discussions on the astrophysical implications of the present results.
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Brehm, K., Becker, H.W., Rolfs, C. et al. The cross section of14N(n, p)14C at stellar energies and its role as a neutron poison forS-process nucleosynthesis. Z. Physik A - Atomic Nuclei 330, 167–172 (1988). https://doi.org/10.1007/BF01293392
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DOI: https://doi.org/10.1007/BF01293392