TY  - JOUR
AU  - AGATA Collaboration (Kaya, L. et al
AU  - Gadea, A.
PY  - 2019
DA  - 2019//
TI  - Isomer spectroscopy in Ba-133 and high-spin structure of Ba-134
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 024323
EP  - 18pp
VL  - 100
IS  - 2
PB  - Amer Physical Soc
AB  - 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.
SN  - 2469-9985
UR  - https://doi.org/10.1103/PhysRevC.100.024323
DO  - 10.1103/PhysRevC.100.024323
LA  - English
N1  - WOS:000480688200004
ID  - AGATACollaborationKaya+Gadea2019
ER  -