Abstract
The high-spin states in the odd-odd 138Pm nucleus have been reinvestigated via the 124Te(19F, 5n) reaction at the beam energy of 103 MeV. Most of the known transitions and levels are confirmed. A number of bands are revised and one new band has been established. For the yrast πh 11/2⊗νh 11/2 band based on 8+ state, no evidence supporting the occurence of signature inversion is found. The experimental and theoretical B(M1)/B(E2) ratios have been calculated for band (2), which support the πg 7/2[413]5/2+ ⊗ νh 11/2[514]9/2− Nilsson configuration assignment. Four bands with ΔI = 2 transitions are tentatively assigned as doubly decoupled bands. The other three bands are proposed as oblate-triaxial bands. The possible configuration assignments for these bands are also discussed under the calculations of total Routhian surface and particle-rotor model.
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Communicated by H. Miyatake
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Li, H.J., Xiao, Z.G., Zhu, S.J. et al. Reinvestigation of the collective band structures in odd-odd 138Pm nucleus. Eur. Phys. J. A 51, 60 (2015). https://doi.org/10.1140/epja/i2015-15060-9
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DOI: https://doi.org/10.1140/epja/i2015-15060-9