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Rebeiro, B M; Triambak, S; Garrett, P E; Ball, G C; Brown, B A; Menéndez, J; Romeo, B; Adsley, P; Lenardo, B G; Lindsay, R; Bildstein, V; Burbadge, C; Coleman, R; Diaz Varela, A; Dubey, R; Faestermann, T; Hertenberger, R; Kamil, M; Leach, K G; Natzke, C; Nzobadila Ondze, J C; Radich, A; Rand, E; Wirth, H-F.
Afiliação
  • Rebeiro BM; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa.
  • Triambak S; Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada.
  • Garrett PE; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa.
  • Ball GC; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa.
  • Brown BA; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
  • Menéndez J; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • Romeo B; Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321, USA.
  • Adsley P; Department of Quantum Physics and Astrophysics and Institute of Cosmos Sciences, University of Barcelona, 08028 Barcelona, Spain.
  • Lenardo BG; Donostia International Physics Center, 20018 San Sebastián, Spain.
  • Lindsay R; Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
  • Bildstein V; SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Burbadge C; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa.
  • Coleman R; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
  • Diaz Varela A; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
  • Dubey R; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
  • Faestermann T; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
  • Hertenberger R; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa.
  • Kamil M; Institute of Physics, University of Szczecin, 70-451 Szczecin, Poland.
  • Leach KG; Physik Department, Technische Universität München, D-85748 Garching, Germany.
  • Natzke C; Fakultät für Physik, Ludwig-Maximilians-Universität München, D-85748 Garching, Germany.
  • Nzobadila Ondze JC; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa.
  • Radich A; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.
  • Rand E; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.
  • Wirth HF; Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa.
Phys Rev Lett ; 131(5): 052501, 2023 Aug 04.
Article em En | MEDLINE | ID: mdl-37595245
ABSTRACT
We used the ^{138}Ba(d,α) reaction to carry out an in-depth study of states in ^{136}Cs, up to around 2.5 MeV. In this Letter, we place emphasis on hitherto unobserved states below the first 1^{+} level, which are important in the context of solar neutrino and fermionic dark matter (FDM) detection in large-scale xenon-based experiments. We identify for the first time candidate metastable states in ^{136}Cs, which would allow a real-time detection of solar neutrino and FDM events in xenon detectors, with high background suppression. Our results are also compared with shell-model calculations performed with three Hamiltonians that were previously used to evaluate the nuclear matrix element (NME) for ^{136}Xe neutrinoless double beta decay. We find that one of these Hamiltonians, which also systematically underestimates the NME compared with the others, dramatically fails to describe the observed low-energy ^{136}Cs spectrum, while the other two show reasonably good agreement.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2023 Tipo de documento: Article País de afiliação: África do Sul
Texto completo
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XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2023 Tipo de documento: Article País de afiliação: África do Sul