Absence of Low-Energy Shape Coexistence in Ge80: The Nonobservation of a Proposed Excited 02+ Level at 639 keV

F. H. Garcia et al.
Phys. Rev. Lett. 125, 172501 – Published 23 October 2020

Abstract

The Ge80 structure was investigated in a high-statistics β-decay experiment of Ga80 using the GRIFFIN spectrometer at TRIUMF-ISAC through γ, βe, eγ, and γγ spectroscopy. No evidence was found for the recently reported 02+ 639-keV level suggested as evidence for low-energy shape coexistence in Ge80. Large-scale shell model calculations performed in Ge78,80,82 place the 02+ level in Ge80 at 2 MeV. The new experimental evidence combined with shell model predictions indicate that low-energy shape coexistence is not present in Ge80.

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  • Received 19 June 2020
  • Revised 19 August 2020
  • Accepted 18 September 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.172501

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 125, Iss. 17 — 23 October 2020

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