ABSOLUTE β-COUNTING IN A PROPORTIONAL FLOW-COUNTER
- 1 April 1959
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Physics
- Vol. 37 (4) , 499-514
- https://doi.org/10.1139/p59-054
Abstract
Self-absorption and backscattering of β-particles have been studied in a proportional flow-counter, and empirical formulae are obtained to correct for these factors in absolute β-counting. The correction factors will depend on the thickness of the sample, the atomic number of the backscattering material, and the maximum energy of the β-particles. Relationships between the mass-absorption coefficient and the maximum energy of the β-particles for the primary β-particles, and between the mass-absorption coefficient, the maximum energy of the β-particles, and the atomic number of the backscattering material for the backscattered β-particles, are obtained. The backscattering function is found to depend on the atomic number of the backscattering material alone.Keywords
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