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THE HALF-LIFE AND GAMMA-RAY ABUNDANCE OF Cs-137

Description: The half life of cesium-137 was determined to be 29.2 plus or minus 0.3 years by an all mass spectrometric method. The abundance of the 662 Kev gamma- ray in the decay scheme was found to be 0.82 plus or minus 0.03 per beta disintegration. In the course of the work, the isotopic distribution of natural barium was determined with improved accuracy to be (72.11 plus or minus 0.06)% 138, (11.18 plus or minus 0.05)% 137, (7.77 plus or minus 0.02)% 136, (6.42 plus or minus 0.03)% 135, (2.33 plus or minus 0.02)% 134, (0.091 plus or minus 0.003)% 132, and (0.098 plus or minus 0.002)% 130. (auth)
Date: June 1, 1962
Creator: Rider, B.F.; Peterson, J.P. Jr. & Ruiz, C.P.
Partner: UNT Libraries Government Documents Department