多管G-M γ连续监测仪

G-M Multi-Tube Continuous Monitoring Device for Gamma Emission

介绍一种由青岛市环境保护监测站研制的采用多管技术的“G-M管γ连续监测仪”及监测方法。该仪器探头使用多只G-M计数管并联,并且合理排列,既提高了仪器的灵敏度又解决了仪器的方向性问题,同时对仪器进行了能响补偿。仪器的角响应(Cs-137源)0°-180°最大偏差小于5％。能量响应相对于Cs-137在60KeV-1250KeV能量范围内小于20％。量程范围10nGy/h～100μGy/h。仪器有两种结构,一种是使用单片机并配有微型打印机、液晶显示、通信接口,实现数据采集。另一种是制做一数据采集卡装入计算机中,探头直接与计算机连接,并配操作软件,使操作、储存、通讯更为方便。

A new device, G-M tube continuous gamma monitoring instrument, which was developed by Qingdao environmental monitoring station that utilizing multi-tube technique and its correspondence monitoring method were proposed in this paper. The probe of the device consists of several parallel connection G-M counting tubes that were arranged in a reasonable manner. In this manner, both the sensitivity of the device has been improved a lot and the problems concerning the directions have been solved. Besides, the device has the function of energy compensation. Performances of the device are as followsAngle response (Cs-137 source): 0皌o 180?Maximum deviation: less than 5%;Energy response: less than 20% (for Cs-137 at the energy range of 60KeV to 1250Kev as reference);Measuring range: lOnGy/h to 100jnGy/h. There are two deferent types of the device: One is designed for the control by a single microchip with a micro printer, LCD and communication interface; the other is designed as a data collecting card which can be easily installed in a micro computer accompanying with its software which can be operated easily.