%0 Journal Article
%T Isospin symmetry in the sd shell: Transition strengths in the neutron-deficient sd shell nucleus Ar-33
%A Wendt, A. et al
%A Algora, A.
%J Physical Review C
%D 2014
%V 90
%N 5
%I Amer Physical Soc
%@ 0556-2813
%G English
%F Wendt+Algora2014
%O WOS:000344489100002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2005), last updated on Thu, 11 Dec 2014 13:56:22 +0000
%X Reduced transition strengths of the deexciting transitions from the first two excited states in Ar-33 were measured in a relativistic Coulomb excitation experiment at the GSI Helmholtz center. The radioactive ion beam was produced by fragmentation of a primary Ar-36 beam on a Be-9 target followed by the selection of the reaction product of interest via the GSI Fragment Separator. The (33A)r beam hit a secondary Au-197 target with an energy of approximately 145 MeV/nucleon. An array of high-purity germanium cluster detectors and large-volume BaF2 scintillator detectors were employed for gamma-ray spectroscopy at the secondary target position. The Lund-York-Cologne Calorimeter was used to track the outgoing ions and to identify the nuclear reaction channels. For the two lowest energy excited states of Ar-33 the reduced transition strengths have been determined. With these first results the T-z = -3/2 nucleus Ar-33 is now, together with Na-21 (T-z = -1/2), the only neutron-deficient odd-A sd shell nucleus in which experimental transition strengths are available. The experimental values are compared to results of shell-model calculations which describe simultaneously mirror-energy differences and transition-strength values of mirror pairs in the sd shell in a consistent way.
%R 10.1103/PhysRevC.90.054301
%U https://doi.org/10.1103/PhysRevC.90.054301
%P 054301-7pp