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  • Kirsebom, O. S.Århus Universitet,Aarhus University (author)

First Accurate Normalization of the β -delayed α Decay of N 16 and Implications for the C 12 (α,γ) O 16 Astrophysical Reaction Rate

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • 2018
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:63e17d3b-1aad-4b66-92ca-1c28f990cd5d
  • https://research.chalmers.se/publication/506481URI
  • https://research.chalmers.se/publication/505749URI
  • https://doi.org/10.1103/PhysRevLett.121.142701DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Published by the American Physical Society. The C12(α,γ)O16 reaction plays a central role in astrophysics, but its cross section at energies relevant for astrophysical applications is only poorly constrained by laboratory data. The reduced α width, γ11, of the bound 1- level in O16 is particularly important to determine the cross section. The magnitude of γ11 is determined via sub-Coulomb α-transfer reactions or the β-delayed α decay of N16, but the latter approach is presently hampered by the lack of sufficiently precise data on the β-decay branching ratios. Here we report improved branching ratios for the bound 1- level [bβ,11=(5.02±0.10)×10-2] and for β-delayed α emission [bβα=(1.59±0.06)×10-5]. Our value for bβα is 33% larger than previously held, leading to a substantial increase in γ11. Our revised value for γ11 is in good agreement with the value obtained in α-transfer studies and the weighted average of the two gives a robust and precise determination of γ11, which provides significantly improved constraints on the C12(α,γ) cross section in the energy range relevant to hydrostatic He burning.

Subject headings and genre

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  • Tengblad, O.CSIC - Instituto de Estructura de la Materia (IEM) (author)
  • Lica, R.Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering,Organisation européenne pour la recherche nucléaire (CERN),European Organization for Nuclear Research (CERN) (author)
  • Munch, M.Århus Universitet,Aarhus University (author)
  • Riisager, K.Århus Universitet,Aarhus University (author)
  • Fynbo, H. O. U.Århus Universitet,Aarhus University (author)
  • Borge, M.CSIC - Instituto de Estructura de la Materia (IEM),Organisation européenne pour la recherche nucléaire (CERN),European Organization for Nuclear Research (CERN) (author)
  • Madurga, M.Organisation européenne pour la recherche nucléaire (CERN),European Organization for Nuclear Research (CERN) (author)
  • Marroquin, I.CSIC - Instituto de Estructura de la Materia (IEM) (author)
  • Andreyev, A.University of York,Japan Atomic Energy Agency (author)
  • Berry, TomUniversity of Surrey (author)
  • Christensen, Esben R.Århus Universitet,Aarhus University (author)
  • Diaz Fernandez, Paloma,1983Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)paloma (author)
  • Doherty, D. T.University of York (author)
  • Van Duppen, P.Katholieke Universiteit Leuven (author)
  • Fraile, L. M.Universidad Complutense de Madrid,Complutense University (author)
  • Gallardo, Mariano C.Universidad Complutense de Madrid,Complutense University (author)
  • Greenlees, P. T.Jyväskylän Yliopisto,University of Jyväskylä,Helsingin Yliopisto,University of Helsinki (author)
  • Harkness-Brennan, L. J.University of Liverpool (author)
  • Hubbard, NicolasUniversity of York,Århus Universitet,Aarhus University (author)
  • Huyse, M.Katholieke Universiteit Leuven (author)
  • Jensen, J. H.Århus Universitet,Aarhus University (author)
  • Johansson, Håkan T,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f96hajo (author)
  • Jonson, Björn,1941Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)bjn (author)
  • Judson, D. S.University of Liverpool (author)
  • Konki, J.Jyväskylän Yliopisto,University of Jyväskylä,Helsingin Yliopisto,University of Helsinki,Organisation européenne pour la recherche nucléaire (CERN),European Organization for Nuclear Research (CERN) (author)
  • Lazarus, I.Daresbury Laboratory (author)
  • Lund, M. V.Århus Universitet,Aarhus University (author)
  • Marginean, N.Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (author)
  • Marginean, R.Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (author)
  • Perea, A.CSIC - Instituto de Estructura de la Materia (IEM) (author)
  • Mihai, C.Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (author)
  • Negret, A.Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (author)
  • Page, R. D.University of Liverpool (author)
  • Pucknell, V.Daresbury Laboratory (author)
  • Rahkila, P.Helsingin Yliopisto,University of Helsinki,Jyväskylän Yliopisto,University of Jyväskylä (author)
  • Sorlin, OlivierOrganisation européenne pour la recherche nucléaire (CERN),European Organization for Nuclear Research (CERN),IN2P3 Institut National de Physique Nucleaire et de Physique des Particules (author)
  • Sotty, C.Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (author)
  • Swartz, Jacobus A.Århus Universitet,Aarhus University (author)
  • Sørensen, H. B.Århus Universitet,Aarhus University (author)
  • Törnqvist, Hans,1985Helmholtz Zentrum,Helmholtz Center,Technische Universität Darmstadt(Swepub:cth)tornqvih (author)
  • Vedia, V.Universidad Complutense de Madrid,Complutense University (author)
  • Warr, N.Universität zu Köln,University of Cologne (author)
  • De Witte, H.Katholieke Universiteit Leuven (author)
  • Århus UniversitetCSIC - Instituto de Estructura de la Materia (IEM) (creator_code:org_t)

Related titles

  • In:Physical Review Letters121:141079-71140031-9007

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