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引言在航空γ能谱测量中,为了定量分析,必需计算钍、铀和钾道的净计数。铀、钍和钾的净计数为 U_净=U_0-αTh_净 (1a) Th_净=Th_0 (1b) K_净=K_0-βTh_净-_γU_净 (1c)式中:U、Th0和K0分别是铀、钍和钾道每秒的背景修正计数;α和β分别是铀和钾窗中钍γ射线的康普顿效应;γ是钾窗中铀γ射线的康普顿效应。在某些国家如美国、加拿大和印度,
INTRODUCTION In aeronautical gamma spectrometry measurements, net counts of thorium, uranium and potassium must be calculated for quantitative analysis. The net counts for uranium, thorium and potassium are U_ net = U_0 - αTh_ net (1a) Th_ net = Th_0 (1b) K_ net = K_0 - βTh_ net__γU_ net (1c) where: U, Th0 and K0 are the background correction counts per second for uranium, thorium and potassium, respectively; α and β are the Compton effect for thorium γ-rays in uranium and potassium windows, respectively; γ is the Compton effect for uranium γ-rays in the potassium window . In some countries, such as the United States, Canada and India,