Nuclear structure and β-decay schemes for Te nuclides beyond N=82

B. Moon et al.
Phys. Rev. C 95, 044322 – Published 25 April 2017

Abstract

We study for the first time the internal structure of Te140 through the β-delayed γ-ray spectroscopy of Sb140. The very neutron-rich Sb140 nuclei with Z=51 and N=89 were produced by the in-flight fission of U238 beams at the Radioactive Isotope Beam Factory, RIKEN. The half-life and spin-parity of Sb140 are reported as 173±12 ms and 3, respectively. In addition to the excited states of Te140 produced by the β-decay branch, the β-delayed one-neutron and two-neutron emission branches were also established. By identifying the first 2+ and 4+ excited states of Te140, we found that Te isotopes persist in their vibrator character with E(4+)/E(2+)=2. We discuss the distinctive features manifest in this region revealed in pairs of isotopes with the same neutron holes and particles with respect to N=82.

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  • Received 24 September 2016
  • Revised 1 April 2017

DOI:https://doi.org/10.1103/PhysRevC.95.044322

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 95, Iss. 4 — April 2017

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