CAJ | 학술논문

目的研究串道现象对饮用水中的总放射性测量结果的影响程度.方法采用不同标准物质、不同的厚度、不同面积进行总放射性测量试验.结果用241 Am粉测试的串道因子数随质量增加无明显变化,铀粉则随质量增加而增加.仪器测试通道不同,串道因子数也不同.总α对总β的串道影响很明显,反过来串道因子数很小,可忽略.串道因子数受样品盘面积的影响不明显.结论做饮用水中总放射性检测使用α-β同时测量模式时,总β放射性活度受α串道影响,可以通过粉末标准物质进行修正,减小对测量结果的影响.
목적 연구천도현상대음용수중적총방사성측량결과적영향정도.방법 채용불동표준물질、불동적후도、불동면적진행총방사성측량시험.결과 용241 Am분측시적천도인자수수질량증가무명현변화,유분칙수질량증가이증가.의기측시통도불동,천도인자수야불동.총α대총β적천도영향흔명현,반과래천도인자수흔소,가홀략.천도인자수수양품반면적적영향불명현.결론 주음용수중총방사성검측사용α-β동시측량모식시,총β방사성활도수α천도영향,가이통과분말표준물질진행수정,감소대측량결과적영향.
Objective To study the influence of crosstalk phenomenon on the measurement of gross radioactivity in drinking water.Methods The gross activity in different standard materials with different thickness and area was measured using national standard method.Results There was no obvious change in crosstalk factor with the increase of 241Am powder amount in the measurement,whereas the larger amount of uranium used might lead to larger crosstalk factor.The different measurement channels resulted in different crosstalk factors.The influence of beta radioactivity on alpha radioactivity measurement was significant.On the contrary,the alpha-to-beta crosstalk factor was negligible.The area of sample plate imposed no significant influence on crosstalk factor.Conclusions The gross beta activity can be corrected to decrease the influence of alpha radioactivity using powder standard samples,when simultaneous alpha and beta counting mode is applied in measurement grass radioactivity in drinking water.