X射线探测元件在1750~3500eV能区的标定

Calibration of X-ray detector at 1750~3500eV energy range

在北京同步辐射装置的4B7A X射线束线上,利用InTe双晶体替换单晶硅晶体分光,获得了1750eV^3500eV能区的单色X射线,光源的能量分辨达到5000,光源强度达到1010phs·s 1,高次谐波小于0.1%,填补了国内X射线标定源这段能区的空白。利用这段能区X射线开展了X射线探测元件灵敏度标定方法研究,给出了XRD探测器灵敏度的不确定度小于3%。

Using InTe crystal to replace Si crystal, homochromatic X-ray light source of 1750-3500eV energy range in the 4B7A X-ray beam line on BSRF was obtained. This light source has energy resolution of more than 5000, intensity of more than 10^10phs·s^- 1, harmonics wave less than 0.1%, and it fills in the domestic gap of X-ray calibration source at this energy range. We make some researches on calibration of XRD＇s sensitivity using X-ray at this energy range, get results of the uncertainty of XRD＇s sensitivity less than 3%.