An in-beam γ-ray study performed with the 121Sb(19F,4n) reaction has established the high spin level structure of the N=78 nucleus 138Nd. States up to I=21ħ and 8.5 MeV excitation energy have been indentified. High spin states are described in the framework of the cranking model and of the interacting boson model with broken pairs. The calculations reproduce levels up to I=18ħ including the two 10+ states which, from the feeding cascades, are identified as the νh11/2-1 and πh11/22 excitations. Cranked Strutinsky type calculations predict opposite shapes for the two different types of excitations.
Broken pairs and evolution of collectivity in the A≊140 mass region: High spin states of the Nd138 nucleus
LUNARDI, SANTO;BRANDOLINI, FRANCO;
1994
Abstract
An in-beam γ-ray study performed with the 121Sb(19F,4n) reaction has established the high spin level structure of the N=78 nucleus 138Nd. States up to I=21ħ and 8.5 MeV excitation energy have been indentified. High spin states are described in the framework of the cranking model and of the interacting boson model with broken pairs. The calculations reproduce levels up to I=18ħ including the two 10+ states which, from the feeding cascades, are identified as the νh11/2-1 and πh11/22 excitations. Cranked Strutinsky type calculations predict opposite shapes for the two different types of excitations.
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