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U.S. Department of Energy
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Tb$sup 160$ AND Ho$sup 160$ DECAY AND Dy$sup 160$ LEVEL SCHEMES (in Russian)

Journal Article · · Izvest. Akad. Nauk S.S.S.R. Ser. Fiz.
OSTI ID:4326299
BS>Radioactive Tb/sup 160 was prepared by slow neutron irradiation of chemically pure (99.99%) Tb/sub 2/O/sub 3/. Beta, conversion electron, and photoelectron spectra were studied on a double-focusing BETA spectrometer wlth halfwidth line 0.3 to 0.6%. Beta and conversion spectra of Tb/sup 160/ are shown. Tb/sup 160/ gamma rays at 880 and 963-966 kev (Th target) are also shown. Radioactive Ho/sup 160/ was prepared by irradiation of a tantalum target with 660- Mev protons, with chromatographic recovery of erbium and holmium fractions. The conversion spectra were studied on the same double focusing spectrometer with half-width line 0.3%. Some areas of Ho/sup 160/ conversion spectra are presented graphically (lines L/sub I+II/, L/sub III/, M, and N of isomeric transitions in Ho/sup 160/ with h nu ' 60.0 kev and doublets 8.731-879.9 kev and 963.4-966.6 kev). The multiplicities of the Dy/sup 160/ transitions were determined from the magnitudes of the relative conversion coefficients K: L and L/sub I/: L/sub II/: L/sub III/ in Tb/sup 160/ and Ho/sup 160/ conversion electron spectra and from the magnitudes of absolute conversion coefficients which are obtained in the Tb/ sup 160/ decay. The scheme of Dy/sup 160/ levels was developed, and the facts supporting and contradicting the proposed scheme are enumerated and discussed. (R.V.J.)
Research Organization:
Zhdanov Leningrad State Univ.
NSA Number:
NSA-12-013422
OSTI ID:
4326299
Journal Information:
Izvest. Akad. Nauk S.S.S.R. Ser. Fiz., Journal Name: Izvest. Akad. Nauk S.S.S.R. Ser. Fiz. Vol. Vol: 22
Country of Publication:
Country unknown/Code not available
Language:
Russian