Abstract
The conversion electron spectrum of the decay of152Eum (9.3 h) has been specially investigated forE0 transitions with the aid of a magnetic spectrometer and coincidence techniques. Besides the knownE0 transitions of 685 keV in152Sm and 615 keV in152Gd two further pureE0 transitions of 432 keV and 1048 keV have been observed. It is shown that theseE0 transitions are identical with those observed previously in the decay of152Tb. NoE0 transitions could be found from a 0+ state of 1083 keV in152Sm. The measured intensities together with the gamma spectrum measured by Barretteet al. give a consistent decay scheme of152Eum.
Furthermore the half-life of the 0+ level at 615 keV in152Gd was measured using the method of “delayed coincidences”. The result was (0.2≦t 1/2≦2.1)×10−10 s. From this theE0 transition probability for the level was derived as (0.3≦W K (E0)≦3.7)× 109 s−1 and theρ-value as 0.10≦¦ρ¦≦0.36. The results are discussed within the framework of the collective model.
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The financial support of the Bundesministerium für Forschung und Technologie is gratefully acknowledged.
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Schneider, U., Hauser, U. OnE0 transitions in the decay of152Eum (9.3 h). Z Physik A 273, 239–249 (1975). https://doi.org/10.1007/BF01410004
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DOI: https://doi.org/10.1007/BF01410004