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Isomeric Character of the Lowest Observed 4
Parker, J J; Wiedenhöver, I; Cottle, P D; Baker, J; McPherson, D; Riley, M A; Santiago-Gonzalez, D; Volya, A; Bader, V M; Baugher, T; Bazin, D; Gade, A; Ginter, T; Iwasaki, H; Loelius, C; Morse, C; Recchia, F; Smalley, D; Stroberg, S R; Whitmore, K; Weisshaar, D; Lemasson, A; Crawford, H L; Macchiavelli, A O; Wimmer, K.
Affiliation
  • Parker JJ; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • Wiedenhöver I; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • Cottle PD; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • Baker J; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • McPherson D; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • Riley MA; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • Santiago-Gonzalez D; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • Volya A; Department of Physics, Florida State University, Tallahassee, Florida, 32306, USA.
  • Bader VM; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Baugher T; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Bazin D; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Gade A; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Ginter T; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Iwasaki H; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Loelius C; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Morse C; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Recchia F; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Smalley D; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Stroberg SR; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Whitmore K; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Weisshaar D; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Lemasson A; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Crawford HL; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Macchiavelli AO; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Wimmer K; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
Phys Rev Lett ; 118(5): 052501, 2017 Feb 03.
Article in En | MEDLINE | ID: mdl-28211717
ABSTRACT
Previous experiments observed a 4^{+} state in the N=28 nucleus ^{44}S and suggested that this state may exhibit a hindered E2-decay rate, inconsistent with being a member of the collective ground state band. We populate this state via two-proton knockout from a beam of exotic ^{46}Ar projectiles and measure its lifetime using the recoil distance method with the GRETINA γ-ray spectrometer. The result, 76(14)_{stat}(20)_{syst} ps, implies a hindered transition of B(E2;4^{+}→2_{1}^{+})=0.61(19) single-particle or Weisskopf units strength and supports the interpretation of the 4^{+} state as a K=4 isomer, the first example of a high-K isomer in a nucleus of such low mass.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2017 Document type: Article Affiliation country: Estados Unidos
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2017 Document type: Article Affiliation country: Estados Unidos