Cross-Section Measurements for Electron Impact on Excited Atomic Species

摘要: Publisher Summary This chapter reviews differential and integral (DCS Q, respectively) cross-section measurement techniques available data for electron collisions with excited neutral atoms. The discusses methods the production detection of atoms, emphasis on recent that relate to measurements. A number improved electron-impact excitation charge-exchange schemes have been reported in years metastable atoms availability lasers, it is now also possible produce large populations levels short radiative lifetimes, as well through cascade processes. latter method is, however, not yet fully exploited. Quantitative measurements require knowledge atom densities (at least relative ground state species) and, cases where more than one species are present, these species. determining described.