Electron-impact excitation and single- and multiple-ionization cross sections of heavy ions: Sn 13+ as an example

摘要: The cross sections of electron impact with Sn${}^{13+}$ resulting in the production Sn${}^{13+}$-Sn${}^{16+}$ are investigated theoretically by using fine-structure-level distorted-wave approximation from threshold to 4000 eV. electron-impact excitation, ionization, and resonant excitation processes included sections. Contributions different determined independent isolated resonance approximations. decay pathways branching ratios for single sequentially multiple autoionization final autoionized states detailed calculations. section forming is largest next those Sn${}^{14+}$ Sn${}^{15+}$. double-ionization Sn${}^{15+}$ smaller than that Sn${}^{14+}$, yet relative magnitude larger at higher incident energy. A comparison a recent measurement single-ionization [A. Borovik, Jr. et al., J. Phys. B 46, 175201 (2013)] showed accurate determination double including contributions crucial obtain results.