Abstract
Neutron-rich isotopes were studied via in-beam -ray spectroscopy after nucleon removal reactions at intermediate energies at the Radioactive Isotope Beam Factory. Based on coincidence analysis, low-lying excitation level schemes are proposed for these nuclei, including the states and states at remarkably low energies. The low-lying states, along with other features, indicate triaxiality in these nuclei. The experimental results are in good overall agreement with self-consistent beyond-mean-field calculations based on the Gogny D1S interaction, which suggests both triaxial degree of freedom and shape coexistence playing important roles in the description of intrinsic deformations in neutron-rich Se isotopes.
- Received 6 July 2016
- Revised 29 March 2017
DOI:https://doi.org/10.1103/PhysRevC.95.041302
©2017 American Physical Society