Journal article

Publication year: 2019

Journal: Physical review A

Volume number: 100

Issue number: 6

ISSN: 2469-9926

eISSN: 2469-9934

DOI Link: https://doi.org/10.1103/PhysRevA.100.062701

Publisher: American Physical Society

Abstract: 
Electron-impact single-ionization cross sections for the W5+ ion have been studied experimentally and theoretically. Measurements of a detailed ionization spectrum and of absolute cross sections were performed employing the crossed-beams method in the energy range from the ionization onset up to 1000 eV. The experimental data show a prominent contribution of W5+ ions in metastable states. The theoretical analysis includes level-to-level calculations from the 4f(14)5s(2)5p(6)5d ground configuration and long-lived levels of the 6s, 5p(5)5d(2), 4f(13)5d(2), and 4f(13)5d 6s configurations. Direct-ionization and excitation-autoionization contributions to the total single-ionization cross sections were calculated employing a distorted-wave approximation. Radiative damping was taken into account. It is shown that correlation effects play an important role and lead to substantial reduction of cross sections. Theory and experiment are in quite good agreement when, within a statistical model, a (85 +/- 9)% fraction of parent ions in the ground configuration is assumed. The strongest contributions of metastable parent ions arise from the 5p(5)5d(2) and 4f(13)5d(2) configurations.

Harvard Citation style: Jonauskas, V., Kyniene, A., Kucas, S., Pakalka, S., Masys, S., Prancikevicius, A., et al. (2019) Electron-impact ionization of W5+, Physical review A, 100(6), Article 062701. https://doi.org/10.1103/PhysRevA.100.062701

APA Citation style: Jonauskas, V., Kyniene, A., Kucas, S., Pakalka, S., Masys, S., Prancikevicius, A., Borovik, A., Gharaibeh, M., Schippers, S., & Müller, A. (2019). Electron-impact ionization of W5+. Physical review A. 100(6), Article 062701. https://doi.org/10.1103/PhysRevA.100.062701