High-spin study of 162Ta

F. Ghazi Moradi et al.
Phys. Rev. C 84, 064312 – Published 13 December 2011

Abstract

Excited states in the odd-odd neutron deficient nucleus 162Ta (Z=73, N=89) have been studied for the first time. The gamma spectroscopy analysis using γγγ coincidences revealed a strongly coupled rotational structure that was established up to large angular momentum states. The rotational band was assigned to the configuration πh11/2[514]9/2νi13/2[660]1/2 based on its rotational and electromagnetic properties. The data are interpreted within the framework of total Routhian surface calculations, which suggests an axially symmetric shape with a γ-soft minimum at β20.16 and γ6. The crossing of the signature partners observed in heavier (N91) odd-odd nuclides in this mass region is found to be absent at N=89. This might be correlated with a change in S-band structure above the paired band crossing at these neutron numbers.

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  • Received 11 October 2011

DOI:https://doi.org/10.1103/PhysRevC.84.064312

©2011 American Physical Society

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Vol. 84, Iss. 6 — December 2011

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