Ionization of Alkali Atoms by Electron Bombardment

摘要: A new experimental method was developed by which relative measurements of ionization cross sections can be normalized to absolute values. The consists essentially combining crossed-beam techniques, adsorption gases on solid surfaces, and radiotracer detection. An atomic beam containing the radioactive tracer is crossed rectilinearly with an electron beam. reaction products are adsorbed collector surfaces detected in a scintillation counter. also quantitatively sampled adsorption. Under consideration parameters, value total section then directly proportional ratio counting rates R/sub ion//R/sub beam/. cross-section curves potassium, rubidium, cesium were presented. values alpha for relation Q/sub i/ = E/sup - BETA / expressing simple as function energy given. scattering partially resolved into their components. Finally, autoionization structure related known levels atom. (auth)