Abstract
An in-beamγ-ray study performed with the114Cd(30Si,p 3n) reaction has established the structure of theN=79 nucleus140Pm. States up toI=(20)ħ and 5.5 MeV excitation energy have been recognized above the 5.95 m isomeric state which we identify, from the GT decay to140Nd, as the 8− member of the (πd 2/−15 vh 2/−111 ) multiplet, changing the present 7− assignment. The low energy part of the level scheme is discussed in terms of the coupling of the valence holes in respect to theZ=64,N=82 shell closure. A new 8+ isomeric state witht 1/2=1 +1−0.5 ns has been observed, having most likely a (πh 11/2 vh -111/2 )8 configuration.
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The authors would like to thank P. Kleinheinz for his precious help on some theoretical aspects of this work.
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de Angelis, G., Lunardi, S., Bazzacco, D. et al. In-beam study of the doubly-odd nucleus 14061 Pm79 above the 8− β +-decaying isomer. Z. Physik A - Hadrons and Nuclei 347, 93–98 (1993). https://doi.org/10.1007/BF01284675
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DOI: https://doi.org/10.1007/BF01284675