LOW MASS ODD-ODD ISOMERS OF THALLIUM
Beta-spectrometer measurements on mass separated sources from synchrocyclotron bombardments of Hg and Tl with protons have yielded information about some previously unknown nucleides: (1.41 plus or minus 0.02)h Tl/sip 196m/ , (11 plus or minus 2) min Pb/sup 194/, (32.8 plus or minus 0.2)min Tl/sup 194m/, and (33.0 plus or minus 0.5)min Tl/sup 19 Reinvestigation of the internal branch of (1.87 plus or minus 0.03)h Tl/sup 198m/ has shown that it is more complex than assumed earlier, suggesting the following level sequence: 7 + (544 kev), 3- (283 kev), 2- (260 kev), and 2- (ground state). In Tl/196/ an analogous pattern is indicated: 7+ (395 kev), 3-- (275 kev), 2-- (241 kev), and 2- - (ground state). No internal brancb was found from Tl/sup 194/, while about 4% I.T. can be calculated for Tl/sup 196m/ and about 55% I.T. for Tl/sup 198/. Some systematic energy level trends are discussed. (auth)
- Research Organization:
- Univ. of Uppsala
- NSA Number:
- NSA-14-010992
- OSTI ID:
- 4202407
- Journal Information:
- Nuclear Phys., Journal Name: Nuclear Phys. Vol. Vol: 15
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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