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本文介绍同位素铅—212(钍B)能从收集半衰期为52秒的氡—220(钍射气)的衰变活性沉。产物得到,以氢氧化钍的固体样品或其他适当的化合物置于电场中,钍射气由固体中逸出进入气相,此时它衰变成半衰期为0.158秒的钋—246(钍A)依次衰变成为钍B的阳电荷离子,这些离子收集带負电荷的极板上。在操作中,以橡皮海棉用水飽和之,使之保持高温度,以鉑线圈作阴极板,铅板作阳极
This paper describes the decay activity of isotope Pb-212 (thorium B) from the collection of radon-220 (thoron) with a half-life of 52 seconds. The product is obtained by placing a solid sample of thorium hydroxide or other suitable compound in an electric field and the thoron gas exiting the solid into the gas phase where it decays to 钋 -246 (thorium A) with a half-life of 0.158 seconds Decay into the positive ions of thorium B ions, these ions collect negatively charged plates. In operation, with rubber sponge water saturation, so that to maintain high temperature, the platinum coil for the cathode plate, lead plate anode