1. Absence of Low-Energy Shape Coexistence in $^{80}\mathrm{Ge}$: The Nonobservation of a Proposed Excited ${0}_{2}^{+}$ Level at 639 keV
- 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., Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
- Subjects
FOS: Physical sciences ,Nuclear Experiment (nucl-ex) ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment ,Nuclear Physics - 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.
- Published
- 2020