Resonant Excitation Double-autoionization in Electron-ion Collision

Key words: 
• electron-ion collision /
• resonant excitation double-autoion ization /
• distorted-wave Born approximation

Abstract: Using semirelativistic distorted-wave Born approximation m et hod, we have calculated direct ionization (DI), excitation autoionization (E A) and resonant excitation double- autoionization (REDA) cross sections of Na- like ions Ti 11+ and Cr 13+ . There is a good agreement between theore tical results and experimental data in magnitude over the entire energy region. REDA processes contribute about 20%-30% to the total ionization cross section a nd cannot be neglected...