Anachkova E, Kellerer A M, Roos H
Strahlenbiologisches Institut, Universität München, Germany.
Radiat Environ Biophys. 1994;33(4):353-64. doi: 10.1007/BF01210456.
A method for testing and calibrating tissue equivalent proportional counters with 37Ar is described. 37Ar is produced by exposure of argon in its normal isotope composition to thermal neutrons. It is shown that--up to volume ratios of 0.01 of argon to the tissue equivalent gas--there is no appreciable effect of the argon admixture on the function of the proportional counter. Conventional calibration methods with characteristic x-rays or with alpha-particles require modifications of the detectors, and they test only small sub-volumes in the counters. In contrast, argon permits calibrations and tests of the resolution that are representative for the entire counter volume and that do not require changes in detector construction. The method is equally applicable to multi-element proportional counters; it is here exemplified by its application to a long cylindrical counter of simplified design that is part of such a multi-element configuration.
描述了一种用³⁷Ar测试和校准组织等效正比计数器的方法。³⁷Ar是通过将正常同位素组成的氩气暴露于热中子而产生的。结果表明，在氩气与组织等效气体的体积比达到0.01之前，氩气混合物对正比计数器的功能没有明显影响。用特征x射线或α粒子的传统校准方法需要对探测器进行修改，而且它们只测试计数器中的小体积子区域。相比之下，氩气允许对整个计数器体积具有代表性且不需要改变探测器结构的分辨率进行校准和测试。该方法同样适用于多元素正比计数器；这里以其应用于一个简化设计的长圆柱形计数器为例进行说明，该计数器是这种多元素配置的一部分。
