论文部分内容阅读
LKB 公司生产的1211型液体闪烁计数器,是一种较为常见的进口放射性测量仪器,该机外形、内部电路和机械结构的设计比较台理,技术性能稳定,基本上满足用户要求。但根据我们的使用和维修经验,这种仪器在经过长时间运行后,容易产生一种比较少见的故障,现象为不计数,即不管是空白瓶还是加有放射性元素 H~3、C~(14)的样品瓶在进入铅室检测后,仪器显示板上关于放射性强度 CPM 一项,在所有各测量道上读数一律为零,但测量时间的显示正常,汁算机的程序设置、样品传输等各种调
The 1211 liquid scintillation counter produced by LKB Company is a kind of common imported radiometric instrument. The design of machine’s internal shape and internal circuit and mechanical structure are compared and its technical performance is stable, basically meeting user’s requirements. However, based on our experience with the use and maintenance of this instrument, it is easy to produce a relatively rare failure after a long period of operation because the instrument does not count whether it is a blank bottle or a radioactive element H ~ 3, C ~ 14) After entering the lead chamber, the instrument panel displays a radioactive intensity CPM reading of zero on all measurement tracks, but the measurement time is normal, the computer program settings, sample transfer, etc. All kinds of tune