Abstract
The positron decay of144Eu is reinvestigated using beta- and gamma-ray spectroscopy techniques. A decay scheme comprising three excited states and four transitions in144Sm is constructed. Three new transitions are observed and have led to the establishment of a second 2+ state populated in this decay. The half-life of144Eu has been accurately measured to be 10.2±0.1 s. Spin-parity assignments are made to all the levels involved in the decay. The structure of144Sm is discussed in the light of different models.
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The authors are grateful for the financial support of this work by the Atomic Energy Control Board of Canada. One of us (G.G.K.) would like to thank the National Research Council of Canada for the scholarship awarded him during the course of this work.
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Kennedy, G.G., Gujrathi, S.C. & Mark, S.K. The second 2+ state in144Sm and the decay of144Eu. Z Physik A 276, 103–105 (1976). https://doi.org/10.1007/BF01437704
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DOI: https://doi.org/10.1007/BF01437704