Aydarous A Sh
Faculty of Energy Systems and Nuclear Science, University of Ontario Institute of Technology, 2000 Simcoe St North, Oshawa, ON, Canada L1H 7K4.
Radiat Prot Dosimetry. 2010 Sep;141(1):64-71. doi: 10.1093/rpd/ncq147. Epub 2010 May 18.
The purpose of this study is to investigate and evaluate the effects of surface and volume activity distributions from spherical-shaped hot particles on surface doses at 4, 7 and 40 mg cm(-2) using the Monte Carlo neutron particle code. The work attempts to examine whether surface dose levels increase or decrease when activity, otherwise distributed throughout the sample volume, is all relocated to the sample surface. Apart from small diameter sources (<0.5 mm), the results clearly indicate that for all depths and source densities, calculated doses based on volume distributed activity are likely to be underestimated. The conversion factors vary depending on the source diameter, the source density and the thickness of the activity layer. To further enhance the study, a comparison between measurements and calculations was also made and discussed.
本研究的目的是使用蒙特卡罗中子粒子代码，研究和评估球形热粒子的表面和体积活度分布对4、7和40mg/cm²表面剂量的影响。这项工作试图检验当原本分布在整个样品体积中的活度全部重新分布到样品表面时，表面剂量水平是增加还是降低。除了小直径源（<0.5mm）外，结果清楚地表明，对于所有深度和源密度，基于体积分布活度计算的剂量可能被低估。转换因子因源直径、源密度和活度层厚度而异。为了进一步加强研究，还对测量值和计算值进行了比较和讨论。
