就地γ谱仪测量某坑道内^(222)Rn-^(220)Rn子体剂量比  

Dose Ratio of ^(222)Rn to ^(220)Rn Progeny in a Pit Using In-Suit HPGe γ Spectrometry

作　　者：张洋[1,2] 尹国辉[1] 吴睿[1] 苏川英[1] 庞璐[1] 冯天成[1] 成智威[1] 刘春雨[2] 

机构地区：[1]西北核技术研究所,陕西西安710024 [2]哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001

出　　处：《核电子学与探测技术》2012年第4期433-437,共5页Nuclear Electronics & Detection Technology

摘　　要：为了解某坑道内222Rn-220Rn子体α潜能浓度比及剂量比的变化,使用就地HPGeγ谱仪分别在坑道内密闭环境和通风两种状态下进行测量,使用相对效率法和α潜能浓度法对测量结果进行分析。结果表明:测量期间,密闭坑道内222Rn-220Rn子体α潜能浓度比平均为3.6,子体剂量比平均为10.8;通风8小时内,坑道中222Rn-220Rn子体α潜能浓度比平均为1.2,子体剂量比平均为3.6;通风约14小时后,坑道内222Rn-220Rn子体α潜能浓度比平均为0.2,子体剂量比平均为0.6,220Rn子体剂量占222Rn-220Rn子体总剂量份额的62%。使用就地HPGeγ谱仪可快速、连续得到坑道内222Rn-220Rn子体α潜能浓度比及剂量比,在未来的222Rn-220Rn剂量研究中有着广阔的应用前景。To probe potentialctenergy concentration （PAEC） ratio and dose ratio of ^222Rn-^220Rn progeny in a pit, in -situ HPGe γ spectrometry was used under atmospheric ventilation and without atmospheric ventilation conditions. The measurement data was analysed using relative efficiency method and PAEC method. The measurement results show that the average PAEC ratio and dose ratio of ^222Rn to ^220Rn progeny under without atmospheric ventilation is 3.6 and 10.8, respectively, which is 1.2 and 3.6 in first 8 hours under atmospheric ventilation. After 14 hours atmospheric ventilation, PAEC ratio and dose ratio are 0.2 and 0.6 stably. In - situ HPGe T spectrometry has a great space in ^222Rn and =^220Rn dose research in the future.

关 键 词：就地Γ谱仪 α潜能浓度 剂量 222Rn 220Rn 

分 类 号：TL814[核科学技术—核技术及应用]