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

V. W. Ingeberg; S. Siem; M. Wiedeking; A. Choplin; S. Goriely; L. Siess; K. J. Abrahams; K. Arnswald; F. Bello Garrote; D. L. Bleuel; J. Cederkäll; T. L. Christoffersen; D. M. Cox; H. De Witte; L. P. Gaffney; A. Görgen; C. Henrich; A. Illana; P. Jones; B. V. Kheswa; T. Kröll; S. N.T. Majola; K. L. Malatji; J. Ojala; J. Pakarinen; G. Rainovski; P. Reiter; M. Von Schmid; M. Seidlitz; G. M. Tveten; N. Warr; F. Zeiser; The ISOLDE Collaboration

doi:10.1103/PhysRevC.111.015803

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

V. W. Ingeberg, S. Siem, M. Wiedeking, A. Choplin, S. Goriely, L. Siess, K. J. Abrahams, K. Arnswald, F. Bello Garrote, D. L. Bleuel, J. Cederkäll, T. L. Christoffersen, D. M. Cox, H. De Witte, L. P. Gaffney, A. Görgen, C. Henrich, A. Illana, P. Jones, B. V. KheswaT. Kröll, S. N.T. Majola, K. L. Malatji, J. Ojala, J. Pakarinen, G. Rainovski, P. Reiter, M. Von Schmid, M. Seidlitz, G. M. Tveten, N. Warr, F. Zeiser, The ISOLDE Collaboration

Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

Sammanfattning

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.

Originalspråk	engelska
Artikelnummer	015803
Antal sidor	14
Tidskrift	Physical Review C
Volym	111
Nummer	1
DOI	https://doi.org/10.1103/PhysRevC.111.015803
Status	Published - 2025 jan.

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© 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.

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Ingeberg, V. W., Siem, S., Wiedeking, M., Choplin, A., Goriely, S., Siess, L., Abrahams, K. J., Arnswald, K., Bello Garrote, F., Bleuel, D. L., Cederkäll, J., Christoffersen, T. L., Cox, D. M., De Witte, H., Gaffney, L. P., Görgen, A., Henrich, C., Illana, A., Jones, P., ... The ISOLDE Collaboration (2025). Nuclear level density and γ -ray strength function of Ni 67 and the impact on the i process. Physical Review C, 111(1), Artikel 015803. https://doi.org/10.1103/PhysRevC.111.015803

@article{6c6b2d64576548a7adf9cad15494c396,

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

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.",

author = "Ingeberg, {V. W.} and S. Siem and M. Wiedeking and A. Choplin and S. Goriely and L. Siess and Abrahams, {K. J.} and K. Arnswald and {Bello Garrote}, F. and Bleuel, {D. L.} and J. Cederk{\"a}ll and Christoffersen, {T. L.} and Cox, {D. M.} and {De Witte}, H. and Gaffney, {L. P.} and A. G{\"o}rgen and C. Henrich and A. Illana and P. Jones and Kheswa, {B. V.} and T. Kr{\"o}ll and Majola, {S. N.T.} and Malatji, {K. L.} and J. Ojala and J. Pakarinen and G. Rainovski and P. Reiter and {Von Schmid}, M. and M. Seidlitz and Tveten, {G. M.} and N. Warr and F. Zeiser and {The ISOLDE Collaboration}",

note = "Publisher Copyright: {\textcopyright} 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.",

year = "2025",

month = jan,

doi = "10.1103/PhysRevC.111.015803",

language = "English",

volume = "111",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "1",

}

Ingeberg, VW, Siem, S, Wiedeking, M, Choplin, A, Goriely, S, Siess, L, Abrahams, KJ, Arnswald, K, Bello Garrote, F, Bleuel, DL, Cederkäll, J, Christoffersen, TL, Cox, DM, De Witte, H, Gaffney, LP, Görgen, A, Henrich, C, Illana, A, Jones, P, Kheswa, BV, Kröll, T, Majola, SNT, Malatji, KL, Ojala, J, Pakarinen, J, Rainovski, G, Reiter, P, Von Schmid, M, Seidlitz, M, Tveten, GM, Warr, N, Zeiser, F & The ISOLDE Collaboration 2025, 'Nuclear level density and γ -ray strength function of Ni 67 and the impact on the i process', Physical Review C, vol. 111, nr. 1, 015803. https://doi.org/10.1103/PhysRevC.111.015803

TY - JOUR

T1 - Nuclear level density and γ -ray strength function of Ni 67 and the impact on the i process

AU - Ingeberg, V. W.

AU - Siem, S.

AU - Wiedeking, M.

AU - Choplin, A.

AU - Goriely, S.

AU - Siess, L.

AU - Abrahams, K. J.

AU - Arnswald, K.

AU - Bello Garrote, F.

AU - Bleuel, D. L.

AU - Cederkäll, J.

AU - Christoffersen, T. L.

AU - Cox, D. M.

AU - De Witte, H.

AU - Gaffney, L. P.

AU - Görgen, A.

AU - Henrich, C.

AU - Illana, A.

AU - Jones, P.

AU - Kheswa, B. V.

AU - Kröll, T.

AU - Majola, S. N.T.

AU - Malatji, K. L.

AU - Ojala, J.

AU - Pakarinen, J.

AU - Rainovski, G.

AU - Reiter, P.

AU - Von Schmid, M.

AU - Seidlitz, M.

AU - Tveten, G. M.

AU - Warr, N.

AU - Zeiser, F.

AU - The ISOLDE Collaboration

N1 - 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.

PY - 2025/1

Y1 - 2025/1

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevC.111.015803

DO - 10.1103/PhysRevC.111.015803

M3 - Article

AN - SCOPUS:85215243192

SN - 2469-9985

VL - 111

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 015803

ER -

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

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