Abstract
The electromagnetic decay of the 11/2− 141mSm is investigated. Internal conversion electron and X-ray-conversion electron coincidence measurements indicate that the state undergoesβ + and electron capture decay with 99.69% strength and the remaining 0.31% goes to a 174.2±0.3 keVM4 transition. TheK/L conversion electron intensity ratio for the transition is measured to be 1.7±0.4. The energy of the 11/2− is established at 175.8±0.3 keV above the 1/2+ ground state in141Sm. Systematics of theM4 transitions in theN=79 and 81 isotones are discussed.
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This research was supported by a grant from the National Research Council of Canada. One of us (J.D.) is grateful to the Council for the scholarships awarded him during the course of this work.
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Kennedy, G.G., Deslauriers, J., Gujrathi, S.C. et al. Search for a 11/2−→3/2+ M 4 transition in141Sm. Z Physik A 279, 395–397 (1976). https://doi.org/10.1007/BF01418135
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DOI: https://doi.org/10.1007/BF01418135