Strong X-ray emission from electrified material

摘要

X-ray emission spectra aie measured for electrified samples and the spectra are compared with those of electrically conductive samples It is found that the electrified samples emit two orders of magnitude stronger X-rays than electrically conductive samples. Peisach et al. [1] reported an enhancement effect occurring in particle-induced X-ray emission (PIXE [2]) spectra. They reported that the X-rays emitted from fluoride targets (CrF_3, FeF_3, CuF_2, or ZnF_2) bombarded by =MeV protons, deuterons, or ~3He~+ ions were stronger than those from metals themselves The origin was not clarified by them Mboweni et al. [3] again reported the above effect, and found that the enhancement factor depended on projectile energy; it was 10~2 for a 500 keV proton,and it rapidly decreased as the projectile energy became larger. We have measured Ni K_α X-ray emission spectra under various experimental conditions, and again observed the enhancement effect for NiF_2. The origin of this effect proved to be electricalcharging: an electrified material has a potential to produce strong X-rays.