Systematic study of spin assignments and signature inversion of {pi}{ital h}{sub 11/2}{circle_times}{nu}{ital h}{sub 11/2} bands in doubly odd nuclei around {ital A}{approximately}130
- Department of Physics, Jilin University, Changchun 130023, People`s Republic of (China)
According to the argument of excitation energy systematics, new spin values are assigned to the lowest observed states of the {pi}{ital h}{sub 11/2}{circle_times}{nu}{ital h}{sub 11/2} bands for doubly odd nuclei {sup 124,126,130,132,134}La, {sup 130{endash}134}Pr, {sup 136,138}Pm, and {sup 138}Eu, and possible new spin values are discussed for doubly odd nuclei {sup 120{endash}130}Cs. Based on these new spin assignments, two systematic features of the {pi}{ital h}{sub 11/2}{circle_times}{nu}{ital h}{sub 11/2} bands are revealed. First, the low spin signature of the {pi}{ital h}{sub 11/2}{circle_times}{nu}{ital h}{sub 11/2} band is inverted for all doubly odd nuclei discussed in the present work. Second, the observed inversion spin increases with increasing neutron number for Cs and La isotopes. These features are in agreement with the recent systematic calculations based on the particle-triaxial-rotor model, with the inclusion of zero-range residual interaction between unpaired proton and neutron of Semmes and Ragnarsson, performed by Tajima. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 286814
- Journal Information:
- Physical Review, C, Vol. 54, Issue 2; Other Information: PBD: Aug 1996
- Country of Publication:
- United States
- Language:
- English
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