Nath R, Schulz R J
Med Phys. 1981 Jan-Feb;8(1):85-93. doi: 10.1118/1.594912.
The response and wall correction factors for various ionization chambers in a cobalt-60 gamma-ray field have been calculated using a Monte Carlo photon-electron transport code. Among the chamber parameters studied are chamber wall material and its thickness, central electrode material and its dimensions, and the shape and size of the sensitive volume. The calculations show that the response and wall correction factors are sensitive to the shape and volume of the ionization chamber, but relatively independent of the choice of material for the chamber wall and electrode when these are compared on the basis of electron density. Data are presented for cylindrical, plane-parallel, and spherical ionization chambers constructed from carbon, magnesium, aluminum, water, Lucite, polystyrene, and ICRU muscle, as well as for a number of commercially available ionization chambers.
使用蒙特卡罗光子 - 电子输运代码计算了钴 - 60γ射线场中各种电离室的响应因子和壁修正因子。研究的电离室参数包括室壁材料及其厚度、中心电极材料及其尺寸，以及灵敏体积的形状和大小。计算结果表明，响应因子和壁修正因子对电离室的形状和体积敏感，但在基于电子密度进行比较时，相对独立于室壁和电极的材料选择。文中给出了由碳、镁、铝、水、有机玻璃、聚苯乙烯和ICRU肌肉制成的圆柱形、平行平板形和球形电离室的数据，以及一些市售电离室的数据。
