摘要
γ能谱法分析压水堆一回路水样品过程中,为获取HPGeγ谱仪高能端的探测效率曲线,选择226Ra和232Th制成土壤标准源,利用226Ra子体214Bi和232Th子体208Tl中几条发射概率较高的!射线进行谱仪探测效率校准。获得的效率曲线经过自吸收修正和符合相加修正,得到了Φ70 mm×30 mm水溶液源高能端(1.120 MeV<Eγ<2.754 MeV)的效率曲线。
In the process of analyzing the sample in the primary coolant of PWR using γ spectrometry,in order to obtain the efficiency curve over the high energy range of HPGe γ spectrometer,226 Ra and232 Th were selected to produce the soil calibration source, and then several ! rays with high emission probabilities in226 Ra's decay products and232 Th's decay products were employed to perform efficiency calibration. The efficiency curve was corrected by self-absorption and true coincidence summing,this paper obtained the efficiency curve of a Φ70 mm×30 mm aqueous calibration source over the high energy range( 1 120 - 2 754 keV).
作者
杨波
魏强林
吴和喜
刘玉娟
刘义保
YANG Bo;WEI Qiang-lin;WU He-xi;LIU Yu-juan;LIU Yi-bao(Engineering Research Center of Nuclear Technology Application, Nanchang 330013, China;School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China)
出处
《核电子学与探测技术》
北大核心
2017年第11期1146-1150,共5页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金(11205031)
江西省高等学校科技落地计划(KJLD12076)
江西省科技厅对外科技合作计划(20144BDH80011)
江西省高等学校教学改革研究(JXJG-16-6-11)资助
关键词
效率校准
Γ谱仪
一回路水
符合相加修正
efficiency calibration
γ-ray spectrometry
primary coolant
true coincidence summing correction