Lifetime measurements of excited states in 162W and 164W and the evolution of collectivity in rare-earth nuclei

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© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
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Lifetime measurements of excited states in 162W and 164W and the evolution of collectivity in rare-earth nuclei

Lifetimes of the first excited 2+ states in the extremely neutron-deficient 162W and 164W nuclei have been measured using the recoil distance Doppler shift technique. Experimental B(E2) data for the isotopic chains of hafnium, tungsten, and osmium, from the midshell region near the β-stability line towards the N = 82 closed shell and the most neutron-deficient nuclides, are compared with predictions of nuclear deformations and 21 + → 0g.s. + reduced transition strengths from different classes of state-of-the-art theoretical model calculations. The results reveal striking differences and deficiencies in the predictive power of current nuclear structure models.

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2469-9985