DETERMINATION OF CONVERSION COEFFICIENTS IN THE DECAY OF BA133 BY MEANS OF SEMICONDUCTOR COUNTERS.
INSTITUTO DE INVESTIGACION AERONAUTICA Y ESPACIAL BUENOS AIRES (ARGENTINA) LABORATORIO DE RADIACIONES
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The K-conversion coefficients corresponding to four transitions in Cs133 were determined applying the electron-gamma coincidence method. The gamma-rays have been detected with conventional scintillation counters. A special electron-gamma coincidence spectrometer was constructed by using, as electron detector, a lithium-drifted semiconductor counter operated into a vacuum chamber at low temperature. An analysis of electron-conversion spectra were performed by studying the line shapes of standard single lines as a function of the energy. The following values were obtained alpha-K 0.0811.34 plus or minus 0.09, KLM5.4 plus or minus 0.5 alpha-K 0.2770.054 plus or minus 0.010, KLM5.5 plus or minus 1.5 alpha-K 0.3050.037 plus or minus 0.003 and alpha-K 0.3560.023 plus or minus 0.002, KLM5.0 plus or minus 0.5. As a by-product the conversion coefficient for the 0.376-MeV transition was determined by analysis of the singles electron and gamma-ray spectra, its value being alpha-K 0.3870.028 plus or minus 0.010, KLM-5 plus or minus 1. Author
- Nuclear Instrumentation
- Radioactivity, Radioactive Wastes and Fission Products