TY  - JOUR
AU  - Zago, L. et al
AU  - Gadea, A.
AU  - Algora, A.
PY  - 2022
DA  - 2022//
TI  - High-spin states in Po-212 above the alpha-decaying (18(+)) isomer
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 137457
EP  - 5pp
VL  - 834
PB  - Elsevier
KW  - gamma spectroscopy
KW  - Isomer spectroscopy
KW  - High-spin spectroscopy
AB  - The nucleus Po-212 has been produced through the fragmentation of a U-238 primary beam at 1GeV/nucleon at GSI, separated with the FRagment Separator, FRS, and studied via isomer gamma-decay spectroscopy with the RISING setup. Two delayed previously unknown gamma rays have been observed. One has been attributed to the E3 decay of a 21(-) isomeric state feeding the alpha-emitting 45-s (18(+)) high-spin isomer. The other gamma-ray line has been assigned to the decay of a higher-lying 23(+) metastable state. These are the first observations of high-spin states above the Po-212 (18(+)) isomer, by virtue of the selectivity obtained via ion-by-ion identification of U-238 fragmentation products. Comparison with shell-model calculations points to shortfalls in the nuclear interactions involving high- jproton and neutron orbitals, to which the region around Z similar to 100 is sensitive.
SN  - 0370-2693
UR  - https://doi.org/10.1016/j.physletb.2022.137457
DO  - 10.1016/j.physletb.2022.137457
LA  - English
N1  - WOS:000890050000015
ID  - Zago_etal2022
ER  -