Measurement of ionization distributions at nanometre level in tissue-equivalent gas

The developed track detector consists of two parts: a small drift region to obtain a good tracking and a relatively large multiplication region for getting an enough high gain at low pressure. All the track detector can be moved in the direction perpendicular to the beam by means of a micrometric screw. An automatic system allows the counting gas to flow continuously at constant pressure through the detector during the measurements. The system can measure ionization distributions at a few nanometer range.

硅热稠密物质状态方程计算

在球元胞、中心力场、相对论Ｆｅｒｍｉ统计近似下，用平均原子模型计算硅热稠密物质在任意温度和密度下的单电子能级和状态方程。不仅提供了硅在高温高压状态下状态方程的数值解，而且可作为研制Ｘ射线激光器的方法，对获得可能的Ｘ光跃迁波长有一定的参考价值。