A STUDY OF THE $beta$-DECAY OF Pa$sup 234$(UZ)
The 6.7-hr Pa/sup 234/(UZ) was separated from 24-day Th/sup 234/ and sources of 2 mu c and less were prepared for the 6-gap beta spectrometer. The continuous beta and conversion-line spectra were measured. Numerous gamma spectra were recorded in coincidence with beta , gamma , and conversion electrons, using a NaI scintillation spectrometer in connection with the beta spectrometer. Fifty-one conversion lines were found and 32 gamma transitions are established. The occurrence of a delayed state, populated in about 1/3 of all decays, with a lifetime longer than 2 x 10/sup -7/ sec, is demonstrated. A decay scheme comprising 16 excited states is proposed, which is consistent with results of combined measurements. In addition to the ground-state rotational band, the scheme exhibits a band built on a level at 922 kev, which may be identified as the gamma vibrational band. (auth)
- Research Organization:
- Univ. of Copenhagen
- NSA Number:
- NSA-16-015677
- OSTI ID:
- 4783014
- Journal Information:
- Nuclear Physics, Journal Name: Nuclear Physics Vol. Vol: 30; ISSN 0029-5582
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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