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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


F. Kaeppeler

E. Uberseder

M. Heil

F. Käppeler

C. Lederer

A. Mengoni

S. Bisterzo

Ethan Uberseder

M. Wiescher

Claudia Lederer

Michael Wiescher

Alberto Mengoni


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.
Keywords Neutron activation; Stellar (n,γ) cross section; s process
Publisher URL
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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©2017 American Physical Society

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