Study of Signature Inversion in the πi13/2 νi13/2Bands of Odd Odd Nuclei
- Received Date: 2002-06-06
- Accepted Date: 1900-01-01
- Available Online: 2003-04-05
Abstract: High-spin states in odd-odd nuclei of 176,178Ir and 182Au have been studied experimentally using heavy-ion- induced fusion-evaporation reactions and standard in-beam γ-ray spectroscopic techniques. Rotational bands built on the πi13/2 νi13/2 configuration have been observed. In addition, on the basis of level spacing systematics, spin assignments have been proposed for the πi13/2 νi13/2 band in 184 Au,which was reported without spin assignments in previous study. It is pointed out that the πi13/2 νi13/2 bands in 176,178Ir and 182,184Au present a low-spin signature inversion. In the theoretical framework of 2-quasiparticle plus rotor model with p- n residual interaction, the signature inversion phenomenon in the πi13/2 νi13/2 bands has been discussed qualitatively. Theoretical investigations have been performed for the πh9/2 νi13/2 and πi13/2 νi13/2 bands using the cranked shell model. It is found that the signature inversions in both configurations can be well reproduced using the pairing and deformation self-consistent cranked Wood-Saxon calculations.