| Issue |
A&A
Volume 659, March 2022
|
|
|---|---|---|
| Article Number | A11 | |
| Number of page(s) | 6 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361/202141801 | |
| Published online | 25 February 2022 | |
Electron-impact single ionization of the nitrogen atom★
Institute of Theoretical Physics and Astronomy Vilnius University,
Saulėtekio av. 3
10257
Vilnius,
Lithuania
e-mail: valdas.jonauskas@tfai.vu.lt
Received:
15
July
2021
Accepted:
23
January
2022
We study electron-impact single ionization for the nitrogen atom by performing level-to-level calculations. The present study includes direct and indirect processes for all levels of the ground configuration. We explain experimental data using the scaled distorted wave cross-sections. Cross-sections obtained for the highest level of the ground configuration are ~70% larger than the ground one. The contribution of the indirect process is equal to ~5% for the ground level, but this contribution reaches ~30% for the highest level of the ground configuration. Good agreement for the single ionization cross-sections is obtained with values calculated using the B-spline R-matrix with the pseudostates method. We compare our results with data from the standard R-matrix with pseudostates calculations. The cross-sections and Maxwellian rate coefficients are tabulated for the electron-impact collisional ionization and excitation-autoionization processes.
Key words: atomic processes / atomic data / plasmas
The tabulated cross sections and thermally averaged rates are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/659/A11
© ESO 2022
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