RADIOACTIVE DECAY OF LUTETIUM-174
Ytterbium oxide enriched to 98.4% in the 174 mass number was irradiated with 6-Mev protons. An activity of approximately 165-day half life was produced and assigned to Lu/sup 174/ by the identification of the ytterbium K x-ray and of the activities produced by similar proton irradiations of the other enriched isotopes of ytterbium. The observed activity of Lu/sup 174/ consists of the L and K x rays of ytterbium and 76.6- and 1228-kev gamma rays which are in coincidence. Because no beta radiation exists in the activity of Lu/sup 174, the mode of decay is solely by electron capture to Yb/sup 174/. Approximately 31% of the disintegrations of Lu/sup 174/ are to the ground state of Yb/sup 174/. In addition to the 76.6-kev level of Yb/sup 174/ there is a 1305-kev level with a spin of 0+. The transitions of Lu/sup 174/ to the 1305-kev level of Yb/sup 174/ are by L capture only and the percentages of electron capture to the 76.6- and 1305-kev levels of Yb/sup 174/ are approximately 59 and 10, respectively. A spin of 1- is assigned to the ground state of Lu/sup 174/. (auth)
- Research Organization:
- Ohio State Univ., Columbus
- NSA Number:
- NSA-14-011108
- OSTI ID:
- 4183315
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 117; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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