Abstract
Neutron-rich Mo107 has been reinvestigated by analyzing the large statistics γ-γ-γ and γ-γ-γ-γ coincidence data from the spontaneous fission of Cf252 at the Gammasphere detector array. Two new bands have been identified. The potential-energy surface calculations of this nucleus have been performed. The calculations show evidence for the 5/2+[413] configuration of the ground-state band and 7/2-[523] configuration for the 348-keV excited band, as assigned in previous work. The two bands newly established are proposed to be one- and two-phonon γ-vibrational bands built on the 7/2-[523] Nilsson orbital, respectively, in the current paper. Triaxial projected shell-model (TPSM) calculations have been performed to explain the level structure and are found in fair agreement with experimental data. In particular, the TPSM study confirms the γ- and γγ-vibrational structure for the two observed excited band structures. Systematics of the one- and two-phonon γ-vibrational bands in the A∼100 Mo series is also discussed.
| Original language | English |
|---|---|
| Article number | 034319 |
| Journal | Physical Review C |
| Volume | 96 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 20 2017 |
| Externally published | Yes |
Funding
The work at Vanderbilt University and Lawrence Berkeley National Laboratory was supported by the US Department of Energy under Grant No. DE-FG05-88ER40407 and Contract No. DE-AC03-76SF00098. The work at Tsinghua University was supported by the National Natural Science Foundation of China under Grant No. 11175095. The author would like to give special thanks for private communication with Yanxin Liu at Huzhou University.