Abstract.
High-spin states of 137La have been investigated with the reaction 130Te(11B, 4n) at a beam energy of 50MeV. The level scheme of 137La has been expanded with spin up to 33/2ℏ. Several new bands have been found in this nucleus. A band crossing in the band based on the 17/2- level has been observed at a rotational frequency of ℏω ∼ 0.48MeV. From systematic comparison, this band crossing probably originates from the alignment of protons. One of the bands with strong M1 transitions is proposed as a collective oblate band ( γ ∼ -60°).
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R. Krücken
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Li, M.L., Zhu, S.J., Xiao, S.D. et al. Identification of band structures in the 137La nucleus. Eur. Phys. J. A 28, 1–4 (2006). https://doi.org/10.1140/epja/i2005-10276-x
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DOI: https://doi.org/10.1140/epja/i2005-10276-x