Shape evolution in self-conjugate nuclei, and the transitional nucleus {sup 68}Se

Journal Article · Tue Sep 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.031304· OSTI ID:21293798

Obertelli, A; Flavigny, F; Goergen, A; Ljungvall, J; Sulignano, B ^[1]; Baugher, T; Bazin, D; Grinyer, G F; Korten, W; Weisshaar, D ^[2]; Delaroche, J -P; Girod, M ^[3]; Gade, A; Glasmacher, T; McDaniel, S; Ratkiewicz, A ^[2]

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1. CEA, Centre de Saclay, IRFU/Service de Physique Nucleaire, F-91191 Gif-sur-Yvette (France)
2. National Superconducting Cyclotron Laboratory, East Lansing (United States)
3. CEA, DAM, DIF, F-91297 Arpajon (France)

We report on the first measurement of the absolute transition strength B(E2;0{sub 1}{sup +}{yields}2{sub 1}{sup +}) in the self-conjugate nucleus {sup 68}Se. It is found that the 0{sub 1}{sup +}{yields}2{sub 1}{sup +} transition displays a strength similar to that for the triaxial {sup 64}Ge nucleus, in sharp contrast to the much stronger collectivity observed for the oblate {sup 72}Kr nucleus. Shape evolution along the N=Z line from zinc to strontium is analyzed through beyond-mean-field calculations using the D1S force. Over this narrow mass region the nuclear structure shows clear-cut transition from prolate to oblate and back to prolate, with {sup 68}Se standing as pivotal between triaxial and oblate deformations.

• OSTI ID: 21293798
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EVOLUTION
GERMANIUM 64
KRYPTON 72
MASS
MEAN-FIELD THEORY
NUCLEAR STRUCTURE
SELENIUM 68
TRANSITION ELEMENTS