%0 Journal Article
%T High-spin states in Po-212 above the alpha-decaying (18(+)) isomer
%A Zago, L. et al
%A Gadea, A.
%A Algora, A.
%J Physics Letters B
%D 2022
%V 834
%I Elsevier
%@ 0370-2693
%G English
%F Zago_etal2022
%O WOS:000890050000015
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5457), last updated on Sat, 04 Feb 2023 09:53:02 +0000
%X 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.
%K gamma spectroscopy
%K Isomer spectroscopy
%K High-spin spectroscopy
%R 10.1016/j.physletb.2022.137457
%U https://doi.org/10.1016/j.physletb.2022.137457
%P 137457-5pp