Abstract
By a systematic on-line cesium mass separation fromA=122 toA=132 and subsequent gamma and electron decay spectroscopy at very low energy, new isomers have been precisely identified:122mCs (T 1/2=0.36±0.02 s),124mCs (T 1/2=6.3±0.2 s) and130mCs (T 1/2=3.46±0.06 min). Detailed level schemes are given for both124mCs and130mCs. Comparison of excited levels known in the odd-odd nuclei of the same region shows that more experimental informations are needed to propose a clear and realistic picture of the nuclear states structure.
Radioactivity:122m, 124m, 130mCs [from La or Ce,3Hexn]-measuredT 1/2,E γ,I γ,E CE ,I CE ,γ-γ-t, γ-ce coinc.; deduced ICC,124, 130Cs deduced levels,J, π. Online mass separated sources, Ge(Li), intrinsic Ge, Si(Li), magnetic electron selector.
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The authors are grateful to the ISOCELE 2 and the ORSAY SYNCHROCYCLOTRON crews for their cooperation during the course of the present investigation.
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Weiss, B., Liang, C.F., Paris, P. et al. New isomers and their decay in odd-odd neutron-deficient cesium isotopes. Z Physik A 313, 173–187 (1983). https://doi.org/10.1007/BF01417225
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DOI: https://doi.org/10.1007/BF01417225