The use of ionization chambers for the absorbed dose calibration of high energy electron beam therapy units |
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| Authors: | P R Almond |
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| Affiliation: | 1. Department of Environmental Science, Babasaheb Bhimrao Ambedkar University Lucknow, Uttar Pradesh, 226025, India;2. Department of Civil Engineering, India Institute of Technology Kharagpur, West Bengal, 721302, India;3. Department of Environmental Engineering, Kwangwoon University, Seoul, 139-701, Republic of Korea;1. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China;2. Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA;1. Department of Physics, University of Education, Lahore, Pakistan;2. Department of Physics, Riphah International University, Lahore, Pakistan;3. Laboratory of Theoretical and Experimental Physics, Department of Physics, Bahauddin Zakariya University, Multan, 60800, Pakistan |
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| Abstract: | ![]()
A system is proposed for high-energy electron-beam calibration using small calibrated thimble ionization chambers. It is suggested that D = R. N.CF when D is the dose in rad., R the chamber reading, N the exposure factor for 60Co and CF is the overall conversion factor dependent upon the mean energy of the primary electrons at the point of measurements. Two sets of experimental data involving several different makes of chambers are compared with theoretical calculations and excellent agreement is found within experimental limits. A set of CF factors is proposed for different initial-energy electrons when a standard calibration phantom is used. |
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