POSITRON SPECTRUM OF Eu$sup 152$ AND Eu$sup 152$m (in Russian)
Journal Article
·
· Zhur. Eksptl'. i Teoret. Fiz.
OSTI ID:4215633
A low background beta spectrometer was employed to study the spectrum of positrons created in the decay of Eu/sup 152/ and Eu/sup 152m/. It was found that beta /sup +/ decay of Eu/sup 152/ takes place to the first (2/sup +/) and second (4/sup +/) excited states of Sm/sup 152/. The end point energies of the partial spectra are 713 kev and 470 kev and their intensities are, respectively, 1.4 x 10/sup -4/ and 5 x 10/sup -5/ beta /sup +/ per decay. Formation of Sm/sup 152/ in the ground and first excited states occurs in the positron decay of the Eu/sup 152m/ isomer. The end point energies of the partial spectra are 890 kev and 770 kev, and intensities are, respectively, 6 x 10/sup -5/ and 2 x 10/sup -5/ beta /sup +/ per decay. The excitation energy of the Eu/sup 152m/ isomer is deduced from the difference of the end point energies of the beta /sup +/ spectra and is found to be 55 plus or minus 6 kev. Pair conversion coefficients and the multipolarities of a number of gamma transitions are derived from the positron internal pair conversion spectra. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-14-003054
- OSTI ID:
- 4215633
- Journal Information:
- Zhur. Eksptl'. i Teoret. Fiz., Journal Name: Zhur. Eksptl'. i Teoret. Fiz. Vol. Vol: 37
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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Related Subjects
BACKGROUND-- BETA DECAY-- BETA SPECTROMETERS-- EUROPIUM 152-- ISOMERS-- MEASURED VALUES-- POSITRONS-- SPECTRA
BETA DECAY-- CONVERSION-- EUROPIUM 152-- GAMMA RADIATION-- ISOMERS- - MEASURED VALUES-- MULTIPOLARITY-- MULTIPOLE RADIATION-- PAIR PRODUCTION-- POSITRONS-- RADIATIONS-- SPECTRA-- TRANSIENTS
BETA DECAY-- ENERGY LEVELS-- EUROPIUM 152-- ISOMERS-- MEASURED VALUES-- POSITRONS-- SAMARIUM 152-- SPECTRA
PHYSICS
BETA DECAY-- CONVERSION-- EUROPIUM 152-- GAMMA RADIATION-- ISOMERS- - MEASURED VALUES-- MULTIPOLARITY-- MULTIPOLE RADIATION-- PAIR PRODUCTION-- POSITRONS-- RADIATIONS-- SPECTRA-- TRANSIENTS
BETA DECAY-- ENERGY LEVELS-- EUROPIUM 152-- ISOMERS-- MEASURED VALUES-- POSITRONS-- SAMARIUM 152-- SPECTRA
PHYSICS