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一、前言随着核技术的发展,辐射探测技术在各个领域中的应用不断扩大,为了能同时测量多个低水平β环境样品,研制了三路低本底β测量装置。该装置采用直径为16毫米或20毫米的金硅面垒型半导体探测器作探头,它能同时测量三个样品。对~(60)Sr—~(90)Y源的探测效率大于30％(2π)时,平均本底小于0.7计数/分。考虑到低水平测量,需要测量较长时间,装置定时时间从1分到6000分。本装置采用电池供电,可以昼夜长时间连续工作。使用操作简便。
I. Introduction With the development of nuclear technology, the application of radiation detection technology in various fields is constantly expanding. In order to measure a plurality of low-level β environmental samples at the same time, three low background β measurement devices are developed. The device uses a 16 mm or 20 mm diameter gold silicon surface barrier type semiconductor detector as a probe, it can measure three samples at the same time. When the detection efficiency of ~ (60) Sr- ~ (90) Y source is more than 30% (2π), the average background is less than 0.7 counts / min. Taking into account the low level of measurement, the need to measure a longer time, the device timing from 1 minute to 6000 minutes. The device uses battery-powered, continuous work day and night long time. Easy to use.