Ionization PRC derived from the present experimental data for Sn^{4 +} (the very top curve) through Sn^{13 +} (the very bottom curve)

Figure 14. Ionization PRC derived from the present experimental data for Sn^{4 +} (the very top curve) through Sn^{13 +} (the very bottom curve).

Abstract

Electron-impact single-ionization cross sections of Sn^{q +} ions in charge states q = 4–13 with 4d^{[10 − (q − 4)]} outer-shell configurations have been studied in the energy range from the corresponding thresholds up to 1000 eV. Absolute cross sections and fine-step energy-scan data have been measured employing the crossed-beams technique. Contributions of different ionization mechanisms have been analysed by comparing the experimental data with calculations employing the configuration-averaged distorted wave approximation. Ionization plasma rate coefficients inferred from the experimental data are also presented.