Four-quasiparticle alignments in Ge-66

Stefanova, E. A. (author)

Stefanescu, I. (author)

de Angelis, G. (author)

Curien, D. (author)

Eberth, J. (author)

Farnea, E. (author)

Gadea, A. (author)

Gersch, G. (author)

Jungclaus, A. (author)

Lieb, K. P. (author)

Martinez, T. (author)

Schwengner, R. (author)

Steinhardt, T. (author)

Thelen, O. (author)

Weisshaar, D. (author)

(creator_code:org_t)

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

The neutron-deficient nucleus Ge-66 was populated at high spin in two experiments using the reaction Ca-40(S-32,alpha2p) at beam energies of 105 and 95 MeV. In the first experiment, a self-supporting Ca-40 target was used, while a gold-backed target of similar thickness was used in the second experiment. gamma rays were detected with the EUROBALL array, combined with the charged-particle detector array EUCLIDES and the Neutron Wall. The level scheme of Ge-66 was extended up to Eapproximate to18 MeV and I-pi=(23(-)). Above angular momentum 10(+), we found two sequences, connected by energetically staggered DeltaI=1 M1 transitions. The total Routhian surface calculations describe Ge-66 at lower spins as a gamma-soft nucleus having a moderate deformation of beta(2)approximate to0.23, while a triaxial deformation is predicted for the band structures above I-pi=10(+). To our knowledge, this is the first observation of staggered M1 transitions in a deformed four-quasiparticle pi(g(9/2)(2))nu(g(9/2)(2)) structure.

By the author/editor: Stefanova, E. A.; Stefanescu, I.; de Angelis, G.; Curien, D.; Eberth, J.; Farnea, E.; show more...; Gadea, A.; Gersch, G.; Jungclaus, A.; Lieb, K. P.; Martinez, T.; Schwengner, R.; Steinhardt, T.; Thelen, O.; Weisshaar, D.; Wyss, Ramon; show less...

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