학술논문
Absence of Low-Energy Shape Coexistence in $^{80}$Ge: The Nonobservation of a Proposed Excited 0$_2^+$ Level at 639 keV
Document Type
Working Paper
Author
Garcia, F. H.; Andreoiu, C.; Ball, G. C.; Bell, A.; Garnsworthy, A. B.; Nowacki, F.; Petrache, C. M.; Poves, A.; Whitmore, K.; Ali, F. A.; Bernier, N.; Bhattacharjee, S. S.; Bowry, M.; Coleman, R. J.; Dillmann, I.; Djianto, I.; Forney, A. M.; Gascoine, M.; Hackman, G.; Leach, K. G.; Murphy, A. N.; Natzke, C. R.; Olaizola, B.; Ortner, K.; Peters, E. E.; Rajabali, M. M.; Raymond, K.; Svensson, C. E.; Umashankar, R.; Williams, J.; Yates, D.
Source
Phys. Rev. Lett. 125, 172501 (2020)
Subject
Language
Abstract
The $^{80}$Ge structure was investigated in a high-statistics $\beta$-decay experiment of $^{80}$Ga using the GRIFFIN spectrometer at TRIUMF-ISAC through $\gamma$, $\beta$-$e$, $e$-$\gamma$ and $\gamma$-$\gamma$ spectroscopy. No evidence was found for the recently reported 0$_2^{+}$ 639-keV level suggested as evidence for low-energy shape coexistence in $^{80}$Ge. Large-scale shell model calculations performed in $^{78,80,82}$Ge place the $0^{+}_{2}$ level in $^{80}$Ge at 2\,MeV. The new experimental evidence combined with shell model predictions indicate that low-energy shape coexistence is not present in $^{80}$Ge.