Study of ionization cross sections and Maxwellian rate coefficients in iso-electronic sequence of krypton

We employ the binary-encounter-dipole model—a parameter-free theoretical framework that merges binary-encounter theory with the high-energy dipole interactions of Bethe theory—to compute electron-impact ionization cross sections and Maxwellian rate coefficients for neutral krypton and its krypton-like iso-electronic ions: Rb+, Sr2+, Y3+, Zr4+, Nb5+, Mo6+, Xe18+, and W38+. Total ionization cross sections, including contributions from both ground and metastable states, are calculated across incident electron energies ranging from the threshold to 10 keV. Corresponding Maxwellian rate coefficients are evaluated over a broad temperature range from 0 to 10 keV. Maxwellian rate coefficients are employed to represent thermally averaged reaction rates by integrating energy-dependent cross sections over the Maxwell–Boltzmann distribution. The theoretical ionization cross sections and Maxwellian rate coefficients obtained in this study are in good agreement with the available experimental data. These results can be used for further study of ionization processes in astrophysical and laboratory plasma environments.