the double Compton scattering and the Compton scattering which produces two photons change the changed wavelength, and the changed wavelength is uncertain, complex and continuous.

• 双光子散射和二次散射与谱线峰值位置的关系不大，二者对峰值波长的改变是不确定的、复杂的、在连续的范围内变化的。