CAJ | 학술논문

ZnS（Ag）涂层厚度会影响盈。Rn／盟。Rn绝对测量小闪烁室的探测效率．用^241Amα电镀参考源对厚度为10mg／cm2的ZnS（Ag）涂层a探测效率进行了实验验证．分别采用解析方法与MCNP模拟方法计算了相对立体角修正因子，讨论了空气层对α粒子的吸收修正，分析了不确定度来源．实验结果表明，10mg／cm2 ZnS（Ag）涂层对“粒子的探测效率在102．4％～103．1％之间，不确定度小于5．44％．在实验不确定度范围内，可认为其对“粒子的探测效率为100％．实验证明了“222Rn／220RnRn绝对测量小闪烁室内采用10mg／cm2厚的ZnS（鲰）涂层是可行的．
ZnS（Ag）도층후도회영향영。Rn／맹。Rn절대측량소섬삭실적탐측효솔．용^241Amα전도삼고원대후도위10mg／cm2적ZnS（Ag）도층a탐측효솔진행료실험험증．분별채용해석방법여MCNP모의방법계산료상대입체각수정인자，토론료공기층대α입자적흡수수정，분석료불학정도래원．실험결과표명，10mg／cm2 ZnS（Ag）도층대“입자적탐측효솔재102．4％～103．1％지간，불학정도소우5．44％．재실험불학정도범위내，가인위기대“입자적탐측효솔위100％．실험증명료“222Rn／220RnRn절대측량소섬삭실내채용10mg／cm2후적ZnS（추）도층시가행적．
The detection efficiency of one small scintillation cell for 222RI1//22~RR absolute measurement can be affected by ZnS （Ag） coating layer thickness on the inner wall of the small scintillation cell. The a detection efficiency of 10 mg,/cm2 thickness ZnS （Ag） coating layer has been tested and verified using a plating reference source （241Am）. The solid angle correction factor is calculated by analysis and MCNP simulation methods. The absorption cor- rection of air layer on α particle has been discussed. The source of uncertainty has been ana- lysed. The results indicate the a detection efficiency of 10 mg/cm2 thickness ZnS （Ag） coat- ing layer is between 102.4% - 103.1% while the uncertainty is less than 5.44%. In the un- certain range ct detection efficiency of it is considered as 100%. 10 mg,/cm2 thickness ZnS （Ag） coating layer can be used to apply on the inner wall of the small scintillation cell for222Rn/22~Rn absolute measurement.