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Title: Four-quasiparticle alignments in Ge-66
Authors: Stefanova, EA ×
Stefanescu, Irina
de Angelis, G
Curien, D
Eberth, J
Farnea, E
Gadea, A
Gersch, G
Jungclaus, A
Lieb, KP
Martinez, T
Schwengner, R
Steinhardt, T
Thelen, O
Weisshaar, D
Wyss, R #
Issue Date: May-2003
Publisher: American physical soc
Series Title: Physical Review C vol:67 issue:5 pages:-
Abstract: 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.
URI: 
ISSN: 0556-2813
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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