基于MCNP5与WINXCOM仿真计算的铋玻璃屏蔽特性研究  

Shielding property of bismuth glass based on MCNP 5 and WINXCOM simulated calculation

作　　者：张志程[1] 陆春海[1,2] 陈敏[3] 张金钊[1] 刘泽[1] 

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059 [2]东华理工大学放射性地质与勘探技术国防重点学科实验室,南昌330013 [3]西南科技大学国防科技学院,绵阳621010

出　　处：《核技术》2013年第11期5-8,共4页Nuclear Techniques

基　　金：核废物与环境安全国防重点学科实验室开放基金项目(10zxnk01);放射性地质与勘探技术国防重点学科实验室开放基金项目(2011RGET022);贵州省教育厅科技项目(2011010);四川省教育厅重点项目(13ZA0067);国家自然科学基金项目(41273031)资助

摘　　要：通过MCNP 5(蒙特卡罗,Monte Carlo)和WINXCOM程序研究了在0.662 MeV、1.17 MeV和1.33 MeV三种γ射线下铋玻璃的衰减系数,并与铅玻璃进行对比。根据衰减倍数K以及综合考虑材料屏蔽性能和机械性能后,材料可以选择含氧化铋含量为50%的铋玻璃。计算了137Cs与60Co源照射以及铋玻璃的厚度分别为2 cm和10 cm的水模体剂量率分布。结果反应出在适合的能量下,铋玻璃可能会替代铅玻璃作为防辐射玻璃。Currently, lead glass is widely used as observation window, while lead is toxic heavy metal Purpose： Non-toxic materials and their shielding effects are researched in order to find a new material to replace lead containing material. Methods： The mass attenuation coefficients of bismuth silicate glass were investigated with 7-ray＇s energy at 0.662 MeV, 1.17 MeV and 1.33 MeV, respectively, by MCNP 5 （Monte Carlo） and WINXCOM program, and compared with those of the lead glass. Results： With attenuation factor K, shielding and mechanical properties taken into consideration, bismuth glass containing 50% bismuth oxide might be selected as the right material. Dose rate distributions of water phantom were calculated with 2-cm and 10-cm thick glass, respectively, irradiated by ^137Cs and ^60Co in turn. Conclusion： Results show that the bismuth glass may replace lead glass for radiation shielding with appropriate energy.

关 键 词：屏蔽材料 蒙特卡罗(Monte Carlo MCNP) 铋玻璃 

分 类 号：TL99[核科学技术—核技术及应用]