ULTRASOFT X-RAY GAS-FLOW PROPORTIONAL COUNTERS
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摘要: 介绍了一种用于测量183～933eV超软X射线的圆柱形、侧窗式、流气式正比计数管,工作气体是0.11MPa的P-10气体或氦气-丙烷混合气体。计数管内径为φ25mm,直径为φ0.3mm的入射窗是由厚度80～90μgcm2聚乙烯甲醛制成的。该计数管的特点:（1）薄窗,对软X射线透过率高。（2）流气式,工作寿命长。（3）能量分辨率好。（4）计数率高(1×1014个/s)。（5）可测能区宽（0.183～10keV）。（6）可以方便更换窗膜材料、厚度及窗口直径。近几年来该计数管已经为高强度低能X光源提供较好监测。Abstract: A cylindrical gas -flow proportional counter with a side window is described in this paper. Which can be used to measure soft X rays in the energy range of 183 ~ 933eV. Its counter gases are P -10 or helium isobutane gases. The pressure is 0.11MPa. The counter has a inner diameter of 25mm and window diameter of 0.3mm made of 80-90μg ·cm2 formvar.
The specialities of this countes are as following: （1） Its window is thin, and has a high transmission for soft X rays. （2）It works in gas-flow form, and has a long lifetime. （3）It has a high energy resolution. （4） Its counting efficency is high up to 1 x 1014s-1. （5） It can work in a wide energy range of 0.183-10keV. （6 ）Its window material, thickness and diameter can be easily replaced.-
Key words:
- gas-flow proportional counters /
- ultrasoft X rays
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