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Nuclear level density and γ -ray strength function of Ni 67 and the impact on the i process

Ingeberg, V. W. ; Siem, S. ; Wiedeking, M. ; Choplin, A. ; Goriely, S. ; Siess, L. ; Abrahams, K. J. ; Arnswald, K. ; Bello Garrote, F. and Bleuel, D. L. , et al. (2025) In Physical Review C 111(1).
Abstract

Proton-γ coincidences from (d,p) reactions between a Ni66 beam and a deuterated polyethylene target have been analyzed with the inverse-Oslo method to find the nuclear level density (NLD) and γ-ray strength function (γSF) of Ni67. The Ni66(n,γ) capture cross section has been calculated using the Hauser-Feshbach model in TALYS using the measured NLD and γSF as constraints. The results confirm that the Ni66(n,γ) reaction acts as a bottleneck when relying on one-zone nucleosynthesis calculations. However, the impact of this reaction is strongly dampened in multizone models of low-metallicity AGB stars experiencing i-process nucleosynthesis.

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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
111
issue
1
article number
015803
pages
14 pages
publisher
American Physical Society
external identifiers
  • scopus:85215243192
ISSN
2469-9985
DOI
10.1103/PhysRevC.111.015803
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by CERN.
id
6c6b2d64-5765-48a7-adf9-cad15494c396
date added to LUP
2025-01-26 14:10:30
date last changed
2025-04-04 15:19:50
@article{6c6b2d64-5765-48a7-adf9-cad15494c396,
  abstract     = {{<p>Proton-γ coincidences from (d,p) reactions between a Ni66 beam and a deuterated polyethylene target have been analyzed with the inverse-Oslo method to find the nuclear level density (NLD) and γ-ray strength function (γSF) of Ni67. The Ni66(n,γ) capture cross section has been calculated using the Hauser-Feshbach model in TALYS using the measured NLD and γSF as constraints. The results confirm that the Ni66(n,γ) reaction acts as a bottleneck when relying on one-zone nucleosynthesis calculations. However, the impact of this reaction is strongly dampened in multizone models of low-metallicity AGB stars experiencing i-process nucleosynthesis.</p>}},
  author       = {{Ingeberg, V. W. and Siem, S. and Wiedeking, M. and Choplin, A. and Goriely, S. and Siess, L. and Abrahams, K. J. and Arnswald, K. and Bello Garrote, F. and Bleuel, D. L. and Cederkäll, J. and Christoffersen, T. L. and Cox, D. M. and De Witte, H. and Gaffney, L. P. and Görgen, A. and Henrich, C. and Illana, A. and Jones, P. and Kheswa, B. V. and Kröll, T. and Majola, S. N.T. and Malatji, K. L. and Ojala, J. and Pakarinen, J. and Rainovski, G. and Reiter, P. and Von Schmid, M. and Seidlitz, M. and Tveten, G. M. and Warr, N. and Zeiser, F.}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Nuclear level density and γ -ray strength function of Ni 67 and the impact on the i process}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.111.015803}},
  doi          = {{10.1103/PhysRevC.111.015803}},
  volume       = {{111}},
  year         = {{2025}},
}