关键词: font-family: 宋体">蒙特卡罗, 全景参考辐射, 空气比释动能, 散射辐射

Abstract:

Reference radiation filedproduced by isotope source is necessary for calibration of radiation dosemeter. Scattered dose is an important characteristic in the reference radiationfield.How to reduce the scattered dose is an important research of radiationmetrology.Monte Carlo method was used to obtain the dose distribution of openand closed geometries free-field gamma reference radiation field, calculatedthe scattered dose. The calculation was tested by the results acquired in theRadiation Metrology Center in order to find a Monte Carlo method to study thefree-field reference radiation field, the photons scattered in floor, walls,air etc. was also calculated.In addition, the conclusion of this study can alsodo good to the design and construct of the free-field radiation field.

Key words: font-family: 'Times New Roman'">Monte Carlo, free-fieldreference, air-kerma, scattered radiation