X-rays from cathode-ray tube contain continuous photons and characteristic photons . Continuous photons are composed of photons with different energies . Different attenuations will happen in photons with different energies when they pass through objects . It is called beam-hardening effect .

X光 管出来的 X射线由连续谱和特征谱组成，连续谱是由一系列能量连续分布的光子组成，不同能量的光子穿过物质时会发生不同的衰减，称为射线的硬化。

Another several parameters affecting spectral lines such as the x-rays tube voltage and x-ray tube target materials target angle target thickness target radius are simulated through the established low-energy x-rays radiation device model .

另外通过建立的低能X射线辐射装置模型模拟了 管电压及 X光管的靶材料、靶角度、靶厚、靶半径等参数对 能量谱线的影响。