Inner-shell excitations of krypton 3d investigated by electron impact with high resolution - art. no. 064701

摘要

The inner-shell excitation spectra of krypton 3d electrons were measured at scattering angles of 0 degrees and 4 degrees by a fast-electron energy-loss spectrometer at an incident energy of 2.5 keV with an energy resolution better than 80 meV. Some interesting optically forbidden transitions were observed and the natural widths of the optically allowed and optically forbidden transitions were analyzed. It shows that the natural widths for the resonances having the same core hole are nearly equal, no matter whether they are optically allowed, optically forbidden, or different members of a Rydberg series.