Abstract
Excited states in the odd-odd, highly neutron-deficient nucleus 166Re have been investigated via the 92Mo(78Kr,
3p1n)
166Re reaction. Prompt γ rays were detected by the JUROGAM II γ -ray spectrometer, and the recoiling
fusion-evaporation products were separated by the recoil ion transport unit (RITU) gas-filled recoil separator
and implanted into the Gamma Recoil Electron Alpha Tagging spectrometer located at the RITU focal plane.
The tagging and coincidence techniques were applied to identify the γ -ray transitions in 166Re, revealing two
collective, strongly coupled rotational structures, for the first time. The more strongly populated band structure is
assigned to the πh11/2[514]9/2− ⊗ νi13/2[660]1/2+ Nilsson configuration, while the weaker structure is assigned
to be built on a two-quasiparticle state of mixed πh11/2[514]9/2− ⊗ ν[h9/2f7/2]3/2− character. The configuration
assignments are based on the electromagnetic characteristics and rotational properties, in comparison with
predictions from total Routhian surface and particle-rotor model calculations.
3p1n)
166Re reaction. Prompt γ rays were detected by the JUROGAM II γ -ray spectrometer, and the recoiling
fusion-evaporation products were separated by the recoil ion transport unit (RITU) gas-filled recoil separator
and implanted into the Gamma Recoil Electron Alpha Tagging spectrometer located at the RITU focal plane.
The tagging and coincidence techniques were applied to identify the γ -ray transitions in 166Re, revealing two
collective, strongly coupled rotational structures, for the first time. The more strongly populated band structure is
assigned to the πh11/2[514]9/2− ⊗ νi13/2[660]1/2+ Nilsson configuration, while the weaker structure is assigned
to be built on a two-quasiparticle state of mixed πh11/2[514]9/2− ⊗ ν[h9/2f7/2]3/2− character. The configuration
assignments are based on the electromagnetic characteristics and rotational properties, in comparison with
predictions from total Routhian surface and particle-rotor model calculations.
| Original language | English |
|---|---|
| Article number | 014310 |
| Number of pages | 9 |
| Journal | Physical Review C (Nuclear Physics) |
| Volume | 92 |
| Issue number | 1 |
| Publication status | Published - 16 Jul 2015 |
Research Beacons, Institutes and Platforms
- Manchester Cancer Research Centre