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Direct Measurement of Resonances in
Psaltis, A; Chen, A A; Longland, R; Connolly, D S; Brune, C R; Davids, B; Fallis, J; Giri, R; Greife, U; Hutcheon, D A; Kroll, L; Lennarz, A; Liang, J; Lovely, M; Luo, M; Marshall, C; Paneru, S N; Parikh, A; Ruiz, C; Shotter, A C; Williams, M.
Afiliação
  • Psaltis A; Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
  • Chen AA; The NuGrid Collaboration.
  • Longland R; Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
  • Connolly DS; The NuGrid Collaboration.
  • Brune CR; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Davids B; Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27710, USA.
  • Fallis J; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • Giri R; Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA.
  • Greife U; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • Hutcheon DA; Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
  • Kroll L; North Island College, 2300 Ryan Road, Courtenay, British Columbia V9N 8N6, Canada.
  • Lennarz A; Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA.
  • Liang J; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.
  • Lovely M; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • Luo M; Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
  • Marshall C; The NuGrid Collaboration.
  • Paneru SN; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • Parikh A; Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
  • Ruiz C; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.
  • Shotter AC; Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
  • Williams M; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
Phys Rev Lett ; 129(16): 162701, 2022 Oct 14.
Article em En | MEDLINE | ID: mdl-36306775
ABSTRACT
We have performed the first direct measurement of two resonances of the ^{7}Be(α,γ)^{11}C reaction with unknown strengths using an intense radioactive ^{7}Be beam and the DRAGON recoil separator. We report on the first measurement of the 1155 and 1110 keV resonance strengths of 1.73±0.25(stat)±0.40(syst) eV and 125_{-25}^{+27}(stat)±15(syst) meV, respectively. The present results have reduced the uncertainty in the ^{7}Be(α,γ)^{11}C reaction rate to ∼9.4%-10.7% over T=1.5-3 GK, which is relevant for nucleosynthesis in the neutrino-driven outflows of core-collapse supernovae (νp process). We find no effect of the new, constrained reaction rate on νp-process nucleosynthesis.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Canadá
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Canadá