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Stellar (n,γ) cross sections of ²³Na

Kaeppeler, F.; Uberseder, E.; Heil, M.; Käppeler, F.; Lederer, C.; Mengoni, A.; Bisterzo, S.; Pignatari, M.; Uberseder, Ethan; Wiescher, M.; Lederer, Claudia; Wiescher, Michael; Mengoni, Alberto

Authors

F. Kaeppeler

E. Uberseder

M. Heil

F. Käppeler

C. Lederer

A. Mengoni

S. Bisterzo

Ethan Uberseder

M. Wiescher

Claudia Lederer

Michael Wiescher

Alberto Mengoni

Abstract

The cross section of the ²³Na(n,γ)²⁴Na reaction has been measured via the activation method at the Karlsruhe 3.7 MV Van de Graaff accelerator. NaCl samples were exposed to quasistellar neutron spectra at kT = 5.1 and 25 keV produced via the ¹⁸O(p,n)¹⁸F and ⁷Li(p,n)⁷Be reactions, respectively. The derived capture cross sections (σ)kT=5keV = 9.1 ± 0.3mb and (σ)kT=25keV = 2.03 ± 0.05 mb are significantly lower than reported in literature. These results were used to substantially revise the radiative width of the first ²³Na resonance and to establish an improved set of Maxwellian average cross sections. The implications of the lower capture cross section for current models of s-process nucleosynthesis are discussed.

Journal Article Type Article
Publication Date Feb 2, 2017
Journal Physical review c
Print ISSN 2469-9985
Electronic ISSN 2469-9993
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 95
Issue 2
Article Number ARTN 025803
Pages 025803
Institution Citation Uberseder, E., Heil, M., Käppeler, F., Lederer, C., Mengoni, A., Bisterzo, S., …Wiescher, M. (2017). Stellar (n,γ) cross sections of ²³Na. Physical Review C, 95(2), 025803. https://doi.org/10.1103/PhysRevC.95.025803
DOI https://doi.org/10.1103/PhysRevC.95.025803
Keywords Neutron activation; Stellar (n,γ) cross section; s process
Publisher URL https://journals.aps.org/prc/abstract/10.1103/PhysRevC.95.025803
Additional Information This is the author's accepted manuscript of an article published in Physical review c, 2017, v.95 issue 2.

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Copyright Statement
©2017 American Physical Society



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