Establishing the Maximum Collectivity in Highly Deformed N = Z Nuclei

The lifetimes of the first excited 2+ states in the N=Z nuclei 80Zr, 78Y, and 76Sr 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 ne...

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Veröffentlicht in:	Physical review letters 2020-04, Vol.124 (15)
Hauptverfasser:	Llewellyn, Ryan 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.
Format:	Artikel
Sprache:	eng
Schlagworte:	A ≤ 89 Collective levels Direct reactions Electromagnetic transitions Lifetimes & widths Nuclear density functional theory Nuclear fragmentation NUCLEAR PHYSICS AND RADIATION PHYSICS Nuclear structure & decays
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Zusammenfassung:	The lifetimes of the first excited 2+ states in the N=Z nuclei 80Zr, 78Y, and 76Sr 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.
ISSN:	0031-9007 1079-7114