DYSPROSIUM FRACTION CONVERSION ELECTRON SPECTRA

Journal Article · Fri Jul 01 04:00:00 EDT 1960 · Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz.

OSTI ID:4136677

Basina, A S; Gromov, K Ya; Dzhelepov, B S

A beta spectrometer with a resolving power of ~1.9% was used in investigating the dysprosium fraction which had been chromatographically separated following the fast neutron irradiation of tantalum. Measurements were made about 1 hr following separation. Observations were made of the Dy/sup 152/, Dy/sup 153/, Dy/sup 155/, and Dy/sup 157/ isotopes. The expe riments were continued for ~30 hr. The dysprosium lines diminished with half lives of 6 hr, 8 to 11 hr, ~20 hr, and several days. The conversion lines at 227 and 271.4 kev for Dy/sup 155/ and 326 kev for Dy/sup 157/ were clearly observed as well as the line near 82 kev. The Tb/sup 155/ yields Cd/sup 155/ lines (T = 5.6 days) at 87, 101, 105, 148, 162, 180, and 263 kev appeared in the spectrum after 50 to 50 hr of irradiation. However, the previously reported lines of Dy/sup 154/ and the daughter lines of Tb/sup 154/ were not observed. The conversion electron characteristics of Dy/sup 153/ and of Tb/suyp 152/ are tabulated. Studies of the dysprosium conversion spectrum show that the intensity increases with a 2 to 2.5 hr period and drops with a 19 to 20 hr period. Three isotopes, Tb/sup 151/, Tb/ sup 152/, and Tb/sup 154/, with a half life of 18 hr were found. A large number of weak lines (E/sub e/ = 433, 448, 455, 492, 532, 543, 570, 652, were found and evaluated. The decay scheme of Tb/sup 152/ yields Gd/sup 152/ is included. (R.V.J.)

• Research Organization: Leningrad State Univ.
• NSA Number: NSA-14-024847
• OSTI ID: 4136677
• Journal Information: Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz., Journal Name: Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz. Vol. Vol: 24
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

BETA SPECTROMETERS
CHROMATOGRAPHY
CONVERSION
DYSPROSIUM 152
DYSPROSIUM 153
DYSPROSIUM 154
DYSPROSIUM 155
DYSPROSIUM 157
ELECTRONS
FAST NEUTRONS
GADOLINIUM 152
GADOLINIUM 155
HALF-LIFE
MEASURED VALUES
NEUTRON BEAMS
PHYSICS
RESOLUTION
SPECTRA
TABLES
TANTALUM
TERBIUM 151
TERBIUM 152
TERBIUM 154
TERBIUM 155