Evidence for collective oblate rotation in N = Z 68 Se

S. M. Fischer, D. P. Balamuth, P. A. Hausladen, C. J. Lister, M. P. Carpenter, D. Seweryniak, J. Schwartz

Research output: Contribution to journalArticlepeer-review

108 Scopus citations

Abstract

A γ-ray spectroscopic measurement of the N=Z nucleus 68Se has been made following the 12C(58Ni,2n) reaction at 185 and 220 MeV using Gammasphere and the Argonne Fragment Mass Analyzer. Despite a very low production cross section of 200(50)μb, two distinct rotational bands were found; the ground state band consistent with oblate collective rotation, and an excited band consistent with prolate rotation. These observations support long-standing predictions that nuclear ground states with substantial oblate (β2∼ −0.3)deformation should exist in this region.

Original languageEnglish
Pages (from-to)4064-4067
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number18
DOIs
StatePublished - 2000
Externally publishedYes

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