Eur. Phys. J. D (2022) 76: 23
https://doi.org/10.1140/epjd/s10053-022-00356-z

Regular Article – Atomic and Molecular Collisions

Dielectronic recombination of ${\text{W}}^{37+}$ and electron-impact ionization of ${\text{W}}^{36+}$

School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, China

^a libw@lzu.edu.cn

Received: 2 September 2021
Accepted: 23 January 2022
Published online: 7 February 2022

Abstract

ab initio calculations of dielectronic recombination rate coefficient of ${\text{W}}^{37+}$ forming ${\text{W}}^{36+}$ and electron-impact ionization cross section of ${\text{W}}^{36+}$ have been performed. Energy levels, radiative transition probabilities, autoionization rates, electron-impact excitation and ionization cross sections are calculated using the flexible atomic code (FAC). Good agreement between the present level-to-level distorted wave treatment and previous ADAS data is found for the dielectronic recombination rate coefficients of ${\text{W}}^{37+}$. Electron-impact direct ionization and excitation-autoionization contributions to the total single-ionization cross sections were calculated employing a level-to-level distorted-wave approximation. The calculation result shows that the total ionization cross section will be underestimated by 50% near ionization threshold to $\sim$ 8% at higher energy without include the contribution from excitation-autoionization process.