%0 Journal Article
%T Isomer spectroscopy in Ba-133 and high-spin structure of Ba-134
%A AGATA Collaboration (Kaya, L. et al
%A Gadea, A.
%J Physical Review C
%D 2019
%V 100
%N 2
%I Amer Physical Soc
%@ 2469-9985
%G English
%F AGATACollaborationKaya+Gadea2019
%O WOS:000480688200004
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4106), last updated on Tue, 27 Aug 2019 12:01:14 +0000
%X The transitional nuclei Ba-134 and Ba-133 are investigated after multinucleon transfer employing the high-resolution Advanced GAmma Tracking Array coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and after fusion-evaporation reaction at the FN tandem accelerator of the University of Cologne, Germany. The J(pi) = 19/2(+) state at 1942 keV in Ba-133 is identified as an isomer with a half-life of 66.6(20) ns corresponding to a B(E1) value of 7.7(4) x 10(-6) e(2) fm(2) for the J(pi) = 19/2(+) to J(pi) = 19/2(-) transition. The level scheme of Ba-134 above the J(pi) = 10(+) isomer is extended to approximately 6 MeV. A pronounced backbending is observed at h omega = 0.38 MeV along the positive-parity yrast band. The results are compared to the high-spin systematics of the Z = 56 isotopes. Large-scale shell-model calculations employing the GCN50:82, SN100PN, SNV, PQM130, Realistic SM, and EPQQM interactions reproduce the experimental findings and elucidate the structure of the high-spin states. The shell-model calculations employing the GCN50:82 and PQM130 interactions reproduce alignment properties and provide detailed insight into the microscopic origin of this phenomenon in transitional Ba-134.
%R 10.1103/PhysRevC.100.024323
%U https://doi.org/10.1103/PhysRevC.100.024323
%P 024323-18pp