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一、绪言在过去,土壤中氡的探测是利用射气仪来实现的。近十年来,一种测氡的积分方法——α径迹法得到了广泛的应用。一般认为其找矿深度可达几十米到上百米。近几年来,一种新的积分测氡法——热释光法也得到了应用。1977年,美国西屋公司研制成了α-2型测铀装置,并获得了专利权。1979年,我们也研制成功了一种CaSO_4(Dy或Tm)——聚四氟乙烯探测器,它能积分记录氡及其子体的α粒子、β粒子或γ射线。几年来的试验结果表明,它能取得与α径迹蚀刻法相同的效果,而且由于这种热释光探测器采用仪器自动读数,因此读数准确又十分方便快速,可用于铀矿普查。
I. INTRODUCTION In the past, the detection of radon in the soil was carried out using a radiometer. In recent ten years, a method of measuring radon - α track method has been widely used. Generally believed that the prospecting depth up to tens of meters to hundreds of meters. In recent years, a new integral radon method - thermoluminescence method has also been applied. In 1977, the Westinghouse Company of the United States developed an α-2 uranium device and obtained the patent. In 1979, we also successfully developed a CaSO_4 (Dy or Tm) -polytetrafluorethylene detector that integrates alpha, beta or gamma rays from radon and its daughters. Test results over the years show that it achieves the same results as the alpha track etch, and because the thermoluminescence detector uses automatic instrument readings, the readings are accurate and very fast and can be used for uranium census.