MATLAB implementation of an analytical model for the emission of x rays from an x-ray tube

An analytical model for the energy and angular distribution of bremsstrahlung and characteristic x rays emitted from an x-ray tube is provided for tungsten and molybdenum targets. The model includes photon mass attenuation coefficients, CSDA ranges, NIST bremsstrahlung cross sections, and bremsstrahlung shape functions extracted from the PENELOPE [v. 2014] materials database. Also included are Monte Carlo-calculated (PENELOPE) electron penetration data, describing the depth, energy, and angular distribution of electrons in thick x-ray targets.

The emission of characteristic x rays is taken into account using a previously developed model, which includes Monte Carlo-calculated depth distributions of x-ray fluorescence (see the related link to dataset below).

A Python implementation of the above model has been included in the following toolkit:
https://bitbucket.org/spekpy/spekpy_release
Some of the key features of this toolkit are also available through a web-based graphical user interface (GUI):
https://spekpy.smile.ki.se/

本研究针对钨及钼靶X射线管产生的韧致辐射（bremsstrahlung）与特征X射线的能量及角分布，构建了专用分析模型。该模型涵盖光子质量衰减系数、连续慢化近似（CSDA）射程、美国国家标准与技术研究院（NIST）韧致辐射截面，以及从PENELOPE [2014版]材料数据库中提取的韧致辐射形状函数。模型同时纳入了基于PENELOPE软件通过蒙特卡洛方法计算得到的电子穿透数据，该数据描述了厚X射线靶材内电子的深度分布、能量分布与角分布。

特征X射线的发射过程可通过已有的成熟模型进行建模，该模型包含了通过蒙特卡洛方法计算得到的X射线荧光深度分布（详见下方数据集相关链接）。

本研究已将上述模型的Python实现集成至如下工具包中：https://bitbucket.org/spekpy/spekpy_release

该工具包的部分核心功能还可通过基于网页的图形用户界面（GUI）进行访问：https://spekpy.smile.ki.se/