Abstract
A recently reported side band in162Er is shown by in-beam conversion electron spectroscopy to have negative parity. The internal conversion coefficients α K of three transitions connecting high-spin side band states to the ground state band, with energies 652.7, 765.4, and 889.7 keV, were measured to be (0.29±0.03)×10−2, (0.21±0.03)×10−2, and (0.16 ±0.03)× 10−2, respectively. These correspond to values expected for E1 transitions. The high-spin negative parity levels, as well as some lower spin levels, are interpreted in context of the quadrupole-octupole coupling model.
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Supported in part by U.S. Energy Research and Development Administration and Robert A. Welch Foundation.
We are indebted to Dr. T. Kishimoto and Dr. C. W. Ma for useful discussions of this work.
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Zolnowski, D.R., Beuscher, H. & Sugihara, T.T. High-spin negative parity band in162Er. Z Physik A 277, 113–115 (1976). https://doi.org/10.1007/BF01433702
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DOI: https://doi.org/10.1007/BF01433702