BETA-GAMMA DIRECTIONAL CORRELATION IN Eu$sup 15$$sup 4$
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
The directional correlation between the nonunique firstforbidden outer beta group of end-point energy 1855 kev in ~Eu/sup 154/ and the 123-kev cascade gamma ray in Gd/sup 154/ was measured at 12 beta energies. The measured beta- gamma correlation coefficient epsilon ranges from - (0.222 plus or minus 0.013) to -(0.314 plus or minus 0.017) at 1150 to 1700 kev, after correcting for the attenuation due to the extranuclear field effect by measuring the attenuation factor G/sub 2/ = 0.71 plus or minus 0.03 in the relation coefficient epsilon varies almost as (p/sup 2//W) in this energy interval. The attenuation effect on the beta-gamma correlation coefficient under different physical conditions of the source was demonstrated experimentally. An analysis of the data by an electronic computer leads to values of the matrix element ratios (Kotani's notation): z = 1, x = 0.5 plus or minus 0.05, u = 0 plus or minus 0.05, and Y = 1.55 plus or minus 0.10. The "modified B/sub ij/ approximation" is reasonably valid in this beta decay. (auth)
- Research Organization:
- Tata Inst. of Fundamental Research, Bombay
- NSA Number:
- NSA-16-023122
- OSTI ID:
- 4809196
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 126; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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