PHOTOPRODUCTION OF A 100-$mu$SEC ISOMER AND ITS TENTATIVE ASSIGNMENT TO Hg$sup 20$$sup 1$
The photoproduction of a 100 plus or minus 6- mu sec isomer from a natural Hg target was studied as a function of bremsstrahlung energy by detecting the 533 plus or minus 7 kev gamma ray which dominates the decay. The isomer is produced mainly by a ( gamma ,n) process which has an apparent threshold of 11.3 plus or minus 0.3 Mev and an integrated cross section of 33 Mev mb if the 30% isotope Hg/sup 202/ is the parent. In the energy range from 9 to 12 Mev, the isomer is probably produced by a ( gamma , gamma ') process. The tentative isotopic assignment is stengthened by the presence of what is apparently the same decay gamma ray in the 22-min Au radioactivity which is usually assigned to Au/ sup 201/. Prompt beta-gamma coincidences were observed for Au/sup 199/ and Au/ sup 200/ but no prompt coincidences were found for Au/sup 201/. The Au/sup 201/ activity has a half life of 22 plus or minus 3 min and a 530 plus or minus 5 kev gamma ray. (auth)
- Research Organization:
- Univ. of Athens
- NSA Number:
- NSA-16-031105
- OSTI ID:
- 4766048
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 128; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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