人体血液模拟液NaCl中中子感生^(24)Na的活度:源-样品距和照射时间的影响  

Activity of neutron-induced Na-24 in NaCl solution to simulate human blood:Effects of the sample-source distance and the irradiation time

作　　者：张金钊[1] 庹先国[1,2] 李哲[1] 刘春来[1] 

机构地区：[1]成都理工大学地学核技术四川省重点实验室,成都610059 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《核技术》2012年第9期661-664,共4页Nuclear Techniques

基　　金：国家自然科学基金(40974065;41025015)

摘　　要：本研究采用自主研发,以NaI为探头的低本底γ测量系统,研究了模拟人体血液的NaCl溶液,在不同照射距离、照射时间下经252Cf中子源照射后24Na比活度的变化。结果显示,比活度与照射距离成指数关系衰减,随照射时间增长成线性关系增加。In an accident of neutron radiation, the neutron dose can be estimated by measuring radioactivity of 24Na in blood of the patients. In this work, NaCl solution as simulated blood was irradiated by a 25Zcf neutron source, and measured by a low background γ-ray measurement system. The 24Na activity was measured at different source-sample distances for different irradiation hours. The 24Na activity after decay correction decreases exponentially with increasing distance, but increases linearly with irradiation time.

关 键 词：24Na活度 252Cf中子源 低本底测量 γ测量 

分 类 号：TL816.2[核科学技术—核技术及应用]