Excitation of Lanthanum and Lutetium Double-Charged Ions in Electron-Atom Collisions

Abstract

Excitation of LaIII and LuIII in collisions of slow electrons with La and Lu atoms (excitation with simultaneous double ionization) have been studied in experiment. At exciting electron energy of 50 eV at 19 excitation cross-sections for each of LaIII and LuIII were measured. At two optical excitation functions for both of ions were recorded, in the electron energy range of 0-200 eV for LaIII and in the range of 0-250 eV for LuIII. Absolute values of excitation cross-sections for similar levels of LaIII and LuIII are compared.