2024 年 67 巻 3 号 p. 106-111
In photoelectron spectroscopy in a gas atmosphere, the charging of an insulator sample is relaxed (environmental charge compensation). Here, we show that the environmental charge compensation effect becomes more remarkable when the distance (d) between the sample and the aperture cone increases. The large d dependence can be attributed to that electron scattering is largely suppressed by the aperture cone with vacuum inside at small d values. Moreover, photoelectron intensities obtained at various d values were found to be reproduced by replacing d with d＋do (do is a constant) in the Beer-Lambert law. The residual gas in the pre-lens is considered to be the cause of do.
