thumbnail

Half-life of Th232 and the branching ratio of Bi212

Physical Review

By:
, , and
DOI: 10.1103/PhysRev.104.1629

Links

Abstract

The half-life of Th232 has been calculated by determining an absolute gamma-disintegration rate for Tl208 in equilibrium with Th232 for three old thorium nitrate salts and one natural thorite sample. The branching ratio, ??(??+??), for Bi212, a necessary parameter in the calculation, was also measured. The half-life of Th232 was found to be 1.42??1010 years within an estimated error of 5%, which is essentially in agreement with the presently accepted value. The branching ratio, ??(??+??), of Bi212 was found to be 0.362??0.006, about 7.4% higher than the currently accepted value. ?? 1956 The American Physical Society.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Half-life of Th232 and the branching ratio of Bi212
Series title:
Physical Review
DOI:
10.1103/PhysRev.104.1629
Volume
104
Issue:
6
Year Published:
1956
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Physical Review
First page:
1629
Last page:
1632