一、引言4πγ电离室的测量对象通常是溶液状的体源,为了减小源的几何效应和源的自吸收以及源瓶壁吸收对电离电流测量结果的影响,历来采用规格化的测量方法,即按规定的重量(或体积)将源溶液置于规定的容器(一般为玻璃安瓿瓶或青霉素瓶)中进行测量。每测量一只源,均需有这样一次制源过程,既费时又费力。因此发展一种可以对盛于不同直 I. Introduction 4πγ ionization chamber measurement object is usually the solution-like body, in order to reduce the source of geometric effects and source of self-absorption and absorption of the source bottle wall on the ionization current measurement results, has always been the use of standardized measurement methods, That is, the source solution is placed in the specified container (usually a glass ampoule or a penicillin bottle) under the specified weight (or volume). Every measurement of a source, are required to have such a source of the process, both time-consuming and laborious. Therefore, the development of a pair of Sheng Sheng in different straight