CAJ | 학술논문

在电离室的内部设置探测器并采用大的电离室腔体,可直接测量气体吸收、降低气体密度分布梯度、避免由于气压不稳、窗膜吸收和窗口尺寸等引起的不确定性.本文分析了引起X光强度测量不确定度的各个因素,给出X光电离室标准探测器的测量不确定度好于5%.
재전리실적내부설치탐측기병채용대적전리실강체,가직접측량기체흡수、강저기체밀도분포제도、피면유우기압불은、창막흡수화창구척촌등인기적불학정성.본문분석료인기X광강도측량불학정도적각개인소,급출X광전리실표준탐측기적측량불학정도호우5%.
Using a detector in an ionization chamber of large cavity, one is able to measure gas absorption directly, with reduced grads of gas density distribution, so as to avoid uncertainties due to air pressure instability, window absorption and size of the window film. In this paper, various factors causing uncertainties in the X-ray intensity measurement were analyzed. Uncertainty of the X-ray ionization standard detector is less than 5%.