Affiliation:
1. Department of Physics & Applied Mathematics, Pakistan Institute of Engineering & Applied Sciences, Nilore, Islamabad, Pakistan
Abstract
GEANT4 based Monte Carlo simulations have been carried out for the
determination of efficiency and conversion factors of a gas-flow ionization
chamber for beta particles emitted by 86 different radioisotopes covering the
average-b energy range of 5.69 keV-2.061 MeV. Good agreements were found
between the GEANT4 predicted values and corresponding experimental data, as
well as with EGS4 based calculations. For the reported set of b-emitters, the
values of the conversion factor have been established in the range of
0.5?1013-2.5?1013 Bqcm-3/A. The computed xenon-to-air conversion factor
ratios have attained the minimum value of 0.2 in the range of 0.1-1 MeV. As
the radius and/or volume of the ion chamber increases, conversion factors
approach a flat energy response. These simulations show a small, but
significant dependence of ionization efficiency on the type of wall material.
Publisher
National Library of Serbia
Subject
Safety, Risk, Reliability and Quality,Nuclear Energy and Engineering
Cited by
2 articles.
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