Establishing the Maximum Collectivity in Highly Deformed N=Z Nuclei

R D O Llewellyn, M A Bentley, R Wadsworth, H Iwasaki, J Dobaczewski, G de Angelis, J Ash, D Bazin, P C Bender, B Cederwall, B P Crider, M Doncel, R Elder, B Elman, A Gade, M Grinder, T Haylett, D G Jenkins, I Y Lee, B LongfellowE Lunderberg, T Mijatović, S A Milne, D Muir, A Pastore, D Rhodes, D Weisshaar

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The lifetimes of the first excited 2^{+} states in the N=Z nuclei ^{80}Zr, ^{78}Y, and ^{76}Sr have been measured using the γ-ray line shape method following population via nucleon-knockout reactions from intermediate-energy rare-isotope beams. The extracted reduced electromagnetic transition strengths yield new information on where the collectivity is maximized and provide evidence for a significant, and as yet unexplained, odd-odd vs even-even staggering in the observed values. The experimental results are analyzed in the context of state-of-the-art nuclear density-functional model calculations.

Original languageEnglish
Article number152501
JournalPhysical Review Letters
Issue number15
Publication statusPublished - 16 Apr 2020

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