Collectivity and Configuration Mixing in Pb186,188 and Po194

T. Grahn et al.
Phys. Rev. Lett. 97, 062501 – Published 7 August 2006

Abstract

Lifetimes of prolate intruder states in Pb186 and oblate intruder states in Po194 have been determined by employing, for the first time, the recoil-decay tagging technique in recoil distance Doppler-shift lifetime measurements. In addition, lifetime measurements of prolate states in Pb188 up to the 8+ state were carried out using the recoil-gating method. The B(E2) values have been deduced from which deformation parameters |β2|=0.29(5) and |β2|=0.17(3) for the prolate and the oblate bands, respectively, have been extracted. The results also shed new light on the mixing between different shapes.

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  • Received 28 March 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.062501

©2006 American Physical Society

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Vol. 97, Iss. 6 — 11 August 2006

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