Lifetime measurements with improved precision in S30,32 and possible influence of large-scale clustering on the appearance of strongly deformed states - INSPIRE

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Lifetime measurements with improved precision in S30,32 and possible influence of large-scale clustering on the appearance of strongly deformed states

Sep 26, 2017

15 pages

Published in:

Phys.Rev.C 96 (2017) 3, 034326,
Phys.Rev.C 98 (2018) 1, 019904 (erratum)

Published: Sep 26, 2017

DOI:

10.1103/PhysRevC.96.034326,
10.1103/PhysRevC.98.019904 (erratum)

View in:

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Abstract: (APS)

The formation of large size clusters and/or their relative motion as possible excitation mode are suggested to be closely related to the origin of deformation in specific cases. In S32, the consideration of some excitations in this nucleus as based on the existence of two doubly magic O16 clusters offers a possible solution to the long-standing problem of missing quadrupole collectivity in shell-model calculations aiming to describe electromagnetic E2 transition strengths and quadrupole moments. To experimentally check again this collectivity, lifetime measurements were performed on S30 and S32. In S32, at least, the reproduction of a number of observables supports the cluster scenario. Additionally, the superdeformed yrast band in Zr80 could find an explanation as based on the relative motion of two Ca40 clusters. Simultaneously, a necessity arises to revise experimentally some lifetimes derived in the past within the Blaugrund approximation when using the Doppler-shift attenuation method.

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