Water-equivalence of ZrO2doped polystyrene by Monte Carlo simulation

VernacularTitle:聚苯乙烯掺入ZrO2的水等效性蒙特卡罗模拟研究
Author: Junhui WANG ¹ ; Baoguo ZHANG ; Rui HU ; Wanxin WEN ; Xuegang CHU
Author Information

1. 215123,苏州大学放射医学与防护学院江苏省高校放射医学协同创新中心
Keywords: Geant4; Water-equivalent; ZrO2nanoparticle; Polystyrene
From: Chinese Journal of Radiological Medicine and Protection 2018;38(6):456-460
CountryChina
Language:Chinese
Abstract: Objective To design water-equivalent plastic scintillator detector for the measurement of absorbed dose in tumor radiotherapy.Methods The concentration of ZrO2to be doped in polystyrene was estimated according to the empirical formula,and then the Monte Carlo program Geant 4(GEometry And Tracking 4)was used to simulate the energy deposition and transport process of X-rays with different energies in water,solid water RW34(composed of 2.1 wt％TiO2doping polystyrene)and different concentrations of ZrO2particles doped in polystyrene.The dose and attenuation coefficients were compared among different materials at different depths of water.Results The doses at different depths and the attenuation coefficient of polystyrene(doped with about 0.4 wt％ZrO2nanoparticles)were much more consistent with those of water and even exhibit much better water-equivalence than RW34.Conclusions The simulation results provide the basis for the development of water-equivalent scintillator.