Spectroscopy and lifetime measurements in Te134,136,138 isotopes and implications for the nuclear structure beyond N=82

G. Häfner et al.
Phys. Rev. C 103, 034317 – Published 22 March 2021

Abstract

We report on spectroscopic information and lifetime measurements of even-even neutron-rich Te isotopes. Excited states were populated in fast-neutron induced fission of U238 at the ALTO facility of IJCLab with the LICORNE neutron source and detected using the hybrid ν-ball spectrometer. We provide first results on lifetimes of the 61+ state in Te136 and the (61+), (41+), and (21+) states in Te138 and discuss the results in the context of large-scale shell-model calculations. The level schemes of Te136 and Te138 are revised in terms of lifetimes of their 21+,41+ states and updated information on the (42+) state in Te136 is presented. In addition, previously reported data on spectroscopy and lifetimes in Te134 are reexamined. This work provides new insights into the evolution of collectivity for Te isotopes with N=82,84,86.

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  • Received 30 September 2020
  • Revised 4 February 2021
  • Accepted 9 March 2021

DOI:https://doi.org/10.1103/PhysRevC.103.034317

©2021 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 103, Iss. 3 — March 2021

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