It is possibly because oil in the target clamber forms carbon foil on the CCD surface and contaminates the X ray CCD. This foil filter absorbs more rays with N band than those of O band.
It is possibly because oil in the target clamber forms carbon foil on the CCD surface and contaminates the X ray CCD. This foil filter absorbs more rays with N band than those of O band.
其原因可能是 X射线 CCD受到靶室油沾污 ,在表面形成了碳膜 ,对 N带吸收较多。