Birch R, Marshall M
Phys Med Biol. 1979 May;24(3):505-17. doi: 10.1088/0031-9155/24/3/002.
A method of computing theoretical X-ray spectra in the range 30-150 kV is presented. The theoretical spectra are compared with constant potential, high resolution spectra from a tungsten target measured with a Ge(Li) detector, for a range of target angles, tube voltage and filtrations. Above 100 kV the spectra were also measured with a NaI detector but, as there was good agreement between the Ge(Li) and NaI detectors, only the former are presented. Spectra computed using Kramers' theory are also included for comparison, giving fairly good agreement at large target angles (30 degrees) but becoming gradually worse as the target angle decreased. Spectra may be computed by this method for any desired filtration, target angle, and tube voltage between 30 and 150 kV, in excellent agreement with the measured data.
本文提出了一种计算30-150 kV范围内理论X射线光谱的方法。将理论光谱与用锗（锂）探测器测量的、在一系列靶角、管电压和过滤条件下来自钨靶的恒电位高分辨率光谱进行了比较。在100 kV以上，还用碘化钠探测器进行了测量，但由于锗（锂）探测器和碘化钠探测器之间有很好的一致性，因此只给出了前者的数据。还包括使用克莱默斯理论计算的光谱用于比较，在大靶角（30度）时给出了相当好的一致性，但随着靶角减小逐渐变差。通过该方法可以计算出30至150 kV之间任何所需过滤、靶角和管电压下的光谱，与测量数据非常吻合。
