High spin states in 178Ir were investigated by means of in-beam γ-ray spectroscopy techniques using the multidetector array GASP. Excited states of 178Ir were populated through the 159Tb(24Mg,5n) fusion-evaporation reaction at E(24Mg)=131–141 MeV. Fourteen rotational bands have been observed and their configurations discussed. Alignments, band crossing frequencies, dynamical and kinematical moments of inertia, and electromagnetic properties have been analyzed in the framework of the cranking model. Signature inversion in the πi13/2⊗νi13/2 and πh9/2⊗νi13/2 structures has been identified and interpreted in the framework of the particle rotor model with residual p-n interaction and variational moment of inertia. In bands involving the πi13/2 orbital an increase in the deformation, relative to the other bands, has been found.
Signature inversion and deformation driving effects in 178Ir
LENZI, SILVIA MONICA;LUNARDI, SANTO;
2003
Abstract
High spin states in 178Ir were investigated by means of in-beam γ-ray spectroscopy techniques using the multidetector array GASP. Excited states of 178Ir were populated through the 159Tb(24Mg,5n) fusion-evaporation reaction at E(24Mg)=131–141 MeV. Fourteen rotational bands have been observed and their configurations discussed. Alignments, band crossing frequencies, dynamical and kinematical moments of inertia, and electromagnetic properties have been analyzed in the framework of the cranking model. Signature inversion in the πi13/2⊗νi13/2 and πh9/2⊗νi13/2 structures has been identified and interpreted in the framework of the particle rotor model with residual p-n interaction and variational moment of inertia. In bands involving the πi13/2 orbital an increase in the deformation, relative to the other bands, has been found.Pubblicazioni consigliate
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