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Half-lives of Sr 73 and y 76 and the consequences for the proton dripline

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Author(s)

  • L. Sinclair
  • G. Lorusso
  • H. Suzuki
  • D. S. Ahn
  • H. Baba
  • F. Browne
  • P. Doornenbal
  • A. Estrade
  • Y. Fang
  • N. Fukuda
  • J. Henderson
  • T. Isobe
  • S. Kubono
  • Z. Li
  • D. Lubos
  • S. Nishimura
  • I. Nishizuka
  • Z. Patel
  • H. Sakurai
  • Y. Shimizu
  • P. Schury
  • H. Takeda
  • P. A. Söderström
  • T. Sumikama
  • H. Watanabe
  • V. Werner
  • Z. Y. Xu

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Publication details

JournalPhysical Review C
DateAccepted/In press - 30 Sep 2019
DatePublished (current) - 16 Oct 2019
Issue number4
Volume100
Number of pages7
Original languageEnglish

Abstract

The half-lives of seven nuclei have been determined in the neutron-deficient mass-70 region following their production via fragmentation of a 345 MeV/nucleon Xe124 primary beam on a 740 mg/cm2 Be9 target at the RI Beam Factory, RIKEN. The results include two new (Sr73 and Y76) half-lives and a more precise measurement for the ground-state half-life of Sr74. The new results are discussed with reference to previously published calculations that predict the location of the proton dripline in the light Sr and Y region of the nuclear chart. In addition, differences in the ground-state structure of Rb72 and Y76 are discussed with the aid of density functional theory calculations. These provide a possible explanation for why Rb72 undergoes proton decay while the α-conjugate nucleus Y76 predominantly undergoes β+ decay.

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