Accession Number : AD0649902

Title :   DETERMINATION OF CONVERSION COEFFICIENTS IN THE DECAY OF BA133 BY MEANS OF SEMICONDUCTOR COUNTERS.

Descriptive Note : Interim rept.,

Corporate Author : INSTITUTO DE INVESTIGACION AERONAUTICA Y ESPACIAL BUENOS AIRES (ARGENTINA) LABORATORIO DE RADIACIONES

Personal Author(s) : Bosch,H. E. ; Szichman,E. ; Baseggio,A. ; Dolinkue,R.

Report Date : DEC 1966

Pagination or Media Count : 19

Abstract : 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 (0.081)=1.34 plus or minus 0.09, (K/LM=5.4 plus or minus 0.5); alpha-K (0.277)=0.054 plus or minus 0.010, (K/LM=5.5 plus or minus 1.5); alpha-K (0.305)=0.037 plus or minus 0.003; and alpha-K (0.356)=0.023 plus or minus 0.002, (K/LM=5.0 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 (0.387)=0.028 plus or minus 0.010, K/LM-5 plus or minus 1. (Author)

Descriptors :   (*BARIUM, *RADIOACTIVE DECAY), (*CESIUM, *INTERNAL CONVERSION), ELECTRONS, EMISSIVITY, RADIOACTIVE DECAY, COINCIDENCE COUNTING, SCINTILLATION COUNTERS, SEMICONDUCTOR DEVICES, NUCLEAR RADIATION SPECTROMETERS, LINE SPECTRA, BETA RAY SPECTROSCOPY, COSMIC RAYS, DECAY SCHEMES, ARGENTINA

Subject Categories : Nuclear Instrumentation
      Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE