Burlin T E, Montelius A, Briggs J
Br J Radiol. 1984 Jan;57(673):65-74. doi: 10.1259/0007-1285-57-673-65.
The form of a general theory of cavity ionisation is outlined and its applications to alpha-particle fields considered. The attenuation of the alpha particles within the cavity, which gives rise to the weighting factor in general cavity theory, is considered in detail and an appropriate treatment for alpha-particle fields developed. Apparatus, consisting of an ionisation chamber composed of electrodes emitting alpha rays, was constructed in order to impose a rigorous test on the theory in the most critical region of cavity size. The general theory of cavity ionisation as applied to alpha-particle fields is shown to be in close agreement with the experimental results. As in the case of photon and electron fields, it is possible to characterise a cavity by a single chord length (path length) but the charged particle energy spectrum and the variation of stopping power with energy must be considered in detail.
概述了空腔电离通用理论的形式，并考虑了其在α粒子场中的应用。详细研究了空腔内α粒子的衰减，这是通用空腔理论中加权因子的来源，并针对α粒子场开发了适当的处理方法。构建了由发射α射线的电极组成的电离室的装置，以便在空腔尺寸最关键的区域对该理论进行严格测试。结果表明，应用于α粒子场的空腔电离通用理论与实验结果非常吻合。与光子和电子场的情况一样，可以用单个弦长（路径长度）来表征一个空腔，但必须详细考虑带电粒子能谱和阻止本领随能量的变化。
