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


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Doncel M., Cederwall B., Qi C., Li H., Jakobsson U., Auranen K., ...More

PHYSICAL REVIEW C, vol.95, no.4, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 95 Issue: 4
  • Publication Date: 2017
  • Doi Number: 10.1103/physrevc.95.044321
  • Title of Journal : PHYSICAL REVIEW C

Abstract

Lifetimes of the first excited 2(+) states in the extremely neutron- deficient W-162 and W-164 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 beta-stability line towards the N = 82 closed shell and the most neutron-deficient nuclides, are compared with predictions of nuclear deformations and 2(1)(+) -> 0(g.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.