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Llewellyn, R D O; Bentley, M A; Wadsworth, R; Iwasaki, H; Dobaczewski, J; de Angelis, G; Ash, J; Bazin, D; Bender, P C; Cederwall, B; Crider, B P; Doncel, M; Elder, R; Elman, B; Gade, A; Grinder, M; Haylett, T; Jenkins, D G; Lee, I Y; Longfellow, B; Lunderberg, E; Mijatović, T; Milne, S A; Muir, D; Pastore, A; Rhodes, D; Weisshaar, D
Physical review letters, 04/2020, Volume: 124, Issue: 15Journal Article
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.
