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The underwater radon density measurement device the radon density measurement manner null which uses this
The underwater radon density measurement device the radon density measurement manner null which uses this
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机译：水下ra密度测量装置使用此方法的the密度测量方式为零
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摘要
PURPOSE: To easily measure radon which has an extremely low concentration and is dissolved in water by dipping a measuring device with carbon deposition film into water to be measured and then detecting the track of α particle generated by radon. ;CONSTITUTION: Carbon electrodes 2, 2 are provided inside a vacuum chamber 1, a plastic film 3 which is for example 20×20×1mm is laid out below it, and spark discharge is made for 90 seconds under a degree of vacuum of 5×10-4Pa and a spark current of 35A, thus forming a carbon deposition film 4 which is 10-15μm thick on the film 3. The carbon deposition film 5 is not peeled, is stable against an organic solvent, and does not react with radon in air. For measuring the radon in water, the film 5 is set to a holder 6 made of teflon and is suspended by a drilling hole, etc., by a wire 7. After the film 5 is dipped into the water to be measured for a certain amount of time, it is etched by 6 N NaOH, the number of α particles is counted by a microscope, and then radon concentration within water is measured, thus estimating the state of underground water and crack of rock ground.;COPYRIGHT: (C)1994,JPO&Japio
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机译：目的：通过将带有碳沉积膜的测量装置浸入待测水中，然后检测由ra产生的α粒子的痕迹，以轻松测量浓度极低且溶于水的ra。 ;构成：在真空室1内设置碳电极2、2，在其下方放置例如20×20×1mm的塑料膜3，并在5的真空度下放电90秒×10 -4 Pa和35A的火花电流，因此在膜3上形成厚度为10-15μm的碳沉积膜4。碳沉积膜5不被剥离，因此对膜稳定。有机溶剂，在空气中不与ra反应。为了测量水中的don，将膜5放置在由聚四氟乙烯制成的支架6上，并通过金属丝7将其悬挂在钻孔等中。在将膜5浸入待测水中一定程度后，将膜5悬挂在待测水中。一段时间后，用6 N NaOH蚀刻，然后用显微镜计数α粒子的数量，然后测量水中的ra浓度，从而估算出地下水的状态和岩石地面的裂缝。 ）1994，日本特许厅
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