论文部分内容阅读
利用简单的辐射仪可以发现放射性增高的区段或场所,这种辐射仪对γ和β射线剂量率的测程分别为0-1500微伦琴/小时和0-2000衰变/分·厘米~2。它的线路(图1)基本上引用了PΠ-1型工业普查辐射仪的线路。为了发现放射性射线,辐射仪中采用了CTC-6型计数管。在计数管未受照射时,电容C_1的充电过程停止,电阻R_1上没有电压降,因而闸流管MTX-90的阴极和控制电极间的电位差为零,闸流管截流。
Radiometric sections or sites can be found using a simple radiometer measuring the dose rates of γ and β rays from 0 to 1500 microLumen per hour and 0 to 2000 decays per minute per centimeter respectively. Its circuit (Figure 1) basically cites the PII-1 industrial census radiometer circuit. In order to detect radioactive rays, a CTC-6 type counter tube was used in the radiometer. When the counting tube is not irradiated, the charging process of the capacitor C_1 is stopped and there is no voltage drop on the resistor R_1. Therefore, the potential difference between the cathode and the control electrode of the thyristor MTX-90 is zero, and the thyristor is cut off.