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Decay studies of a long lived high spin isomer of /sup 210/Bi

Technical Report ·
DOI:https://doi.org/10.2172/7329679· OSTI ID:7329679

A source of approximately 30 ..mu..g of pure (> 90%) /sup 210m/Bi (J..pi.. = 9-) was prepared by irradiating /sup 209/Bi in a nuclear reactor. After chemical separations to remove /sup 210/Po from the irradiated bismuth sample were completed, the /sup 210/Bi was electromagnetically separated from the /sup 209/Bi by a series of two isotope separations to create the source mentioned above. This source was then used to conduct alpha, conversion electron, gamma, gamma-gamma coincidence, and alpha-gamma coincidence spectroscopic studies of the decay of /sup 210m/Bi. The partial half life for the alpha decay of /sup 210m/Bi was measured as 3.0 x 10/sup 6/ yr. A lower limit of 10/sup 13/ years was set for the partial half life for the decay of /sup 210m/Bi to /sup 210/Po. Alpha decay of /sup 210m/Bi to 8 excited states of /sup 206/Tl was observed. A lower limit of 10/sup -4/% was set for the branching ratio of the parity forbidden alpha decay of /sup 210/Bi to the /sup 206/Ti ground state. Theoretical decay rates for the alpha decays of /sup 210m/Bi, /sup 210/Bi, /sup 211/Po, and /sup 211m/Po were calculated using the method developed by Hans Mang. A comparison of the calculated and experimentally measured alpha decay rates of /sup 210m/Bi showed good agreement for the relative alpha decay rates.

Research Organization:
California Univ., Berkeley (USA). Lawrence Berkeley Lab.
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
7329679
Report Number(s):
LBL-4460
Country of Publication:
United States
Language:
English

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Related Subjects

651922* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Radioactive Decay-- (-1987)
651923 -- Nuclear Properties & Reactions
A=190-219
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BISMUTH 210
BISMUTH ISOTOPES
BRANCHING RATIO
DAYS LIVING RADIOISOTOPES
DECAY
ENERGY LEVELS
FUNCTIONS
HALF-LIFE
HEAVY NUCLEI
HIGH SPIN STATES
ISOMERIC NUCLEI
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
PARTICLE DECAY
RADIOISOTOPES
THALLIUM 206
THALLIUM ISOTOPES
WAVE FUNCTIONS
YEARS LIVING RADIOISOTOPES