ESR response of CFQ-Gd2O3 dosimeters to a mixed neutron-gamma field: Monte Carlo simulation.
Clear fused quartz (CFQ) may be considered a suitable material for electron and gamma dose measurements using electron spin resonance (ESR) technique. Research has been ongoing to optimize the neutron capture therapy (NCT) mechanism and its effects in cancer treatment. Neutron sources of the mixed neutron-gamma field are a challenge for this treatment method. A reliable dosimetric measurement and treatment should be able to determine various components of this mixed field. In this study, the ESR response of cylindrical and spherical shells of CFQ dosimeters, filled with Gd2O3, when exposed to a thermal neutron beam, has been investigated using Monte Carlo simulation. In order to maximize the ESR response, the dimensions of the outer and inner parts of the samples have been chosen as variables, and the amount of energy deposited in the samples has been determined. The optimum size of the samples has been determined, and the capability of discriminating gamma and neutron dose in a mixed neutron-gamma field regarding the CFQ-Gd2O3 dosimeter has also been widely studied.
Faculty of Physics, Shahid Bahonar University of Kerman, Kerman, Iran. Electronic address: m.hoseininaveh@gmail.com.
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M
Hoseininaveh
Faculty of Physics, Shahid Bahonar University of Kerman, Kerman, Iran.
A H
AH
Ranjbar
D000409:Alanine; D004578:Electron Spin Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D005682:Gadolinium; D005720:Gamma Rays; D006801:Humans; D009010:Monte Carlo Method; D017247:Neutron Capture Therapy; D009502:Neutrons; D011791:Quartz; D011874:Radiometry / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data
D011791:Quartz; C030581:gadolinium oxide; D005682:Gadolinium; D000409:Alanine
CFQ–Gd(2)O(3) dosimeter; ESR dosimetry; Mixed neutron–gamma field; Monte Carlo simulation