Abstract
Study of the energy levels of156Dy through the159Tb(p, 4n)156Dy reaction has revealed the existence of six states with excitation energies between 1.8 and 2.8 MeV and spins between 6 and 12. Some of them can tentatively be assigned as low-spin members of “upper” bands which are thought to be responsible for the backbending phenomenon experimentally observed in the ground-state andβ-vibrational bands of this nucleus. Others could be levels of a negative-parity octupole band.
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We thank Drs. R. Broglia and A. Molinari for communicating to us the results of their calculations prior to publication, and Pr. Dr. A. Faessler for very fruitful discussions on the significance of the results of the present paper.
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El Masri, Y., Janssens, R., Michel, C. et al. Experimental evidence for low-spin members of “upper” bands in156Dy. Z Physik A 274, 113–119 (1975). https://doi.org/10.1007/BF01408462
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DOI: https://doi.org/10.1007/BF01408462