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First Observation of Unbound
Webb, T B; Wang, S M; Brown, K W; Charity, R J; Elson, J M; Barney, J; Cerizza, G; Chajecki, Z; Estee, J; Hoff, D E M; Kuvin, S A; Lynch, W G; Manfredi, J; McNeel, D; Morfouace, P; Nazarewicz, W; Pruitt, C D; Santamaria, C; Smith, J; Sobotka, L G; Sweany, S; Tsang, C Y; Tsang, M B; Wuosmaa, A H; Zhang, Y; Zhu, K.
Afiliação
  • Webb TB; Department of Physics, Washington University, St. Louis, Missouri 63130, USA.
  • Wang SM; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Brown KW; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Charity RJ; Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA.
  • Elson JM; Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA.
  • Barney J; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Cerizza G; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Chajecki Z; Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA.
  • Estee J; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Hoff DEM; Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA.
  • Kuvin SA; Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA.
  • Lynch WG; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Manfredi J; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • McNeel D; Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA.
  • Morfouace P; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Nazarewicz W; Department of Physics and Astronomy and FRIB Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Pruitt CD; Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA.
  • Santamaria C; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Smith J; Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA.
  • Sobotka LG; Department of Physics, Washington University, St. Louis, Missouri 63130, USA.
  • Sweany S; Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA.
  • Tsang CY; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Tsang MB; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Wuosmaa AH; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Zhang Y; Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA.
  • Zhu K; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
Phys Rev Lett ; 122(12): 122501, 2019 Mar 29.
Article em En | MEDLINE | ID: mdl-30978039
ABSTRACT
The structure of the extremely proton-rich nucleus _{8}^{11}O_{3}, the mirror of the two-neutron halo nucleus _{3}^{11}Li_{8}, has been studied experimentally for the first time. Following two-neutron knockout reactions with a ^{13}O beam, the ^{11}O decay products were detected after two-proton emission and used to construct an invariant-mass spectrum. A broad peak of width ∼3.4 MeV was observed. Within the Gamow coupled-channel approach, it was concluded that this peak is a multiplet with contributions from the four lowest ^{11}O resonant states J^{π}=3/2_{1}^{-}, 3/2_{2}^{-}, 5/2_{1}^{+}, and 5/2_{2}^{+}. The widths and configurations of these states show strong, nonmonotonic dependencies on the depth of the p-^{9}C potential. This unusual behavior is due to the presence of a broad threshold resonant state in ^{10}N, which is an analog of the virtual state in ^{10}Li in the presence of the Coulomb potential. After optimizing the model to the data, only a moderate isospin asymmetry between ground states of ^{11}O and ^{11}Li was found.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article