Excitation Dynamics of the 5p^6 Auger Spectra in Ba + e^– Collisions


  • O.O. Borovik Institute of Electron Physics Nat. Acad. of Sci. of Ukraine, Uzhhorod National University




atom, ion, ionization, autoionization, Auger spectra, cross-section


The ionization of the 5p6 subshell in Ba atoms has been studied in an electron-impact energy range 23–105 eV by measuring the Auger spectra arising from the decay of the 5p5nln′l′ states. The energy dependences of the ionization cross-section have been obtained for nine states in the 5p55d2, 5p55d6s and 5p56s2 configurations. The analysis of the behavior of the cross-sections made it possible to determine the role of direct and indirect ionization processes involved in the 5p6 ionization of the Ba atom.


F. Calegari, G. Sansone, S. Stagira, C. Vozzi, M. Nisoli. Advances in attosecond science. J. Phys. B: At. Mol. Opt. Phys. 49, 062001 (2016).


I. Courtillot, A. Quessada-Vial, A. Brusch, D. Kolker, G.D. Rovera, P. Lemonde. Accurate spectroscopy of Sr atoms. Eur. Phys. J. D 33, 161 (2005).


A. McWilliam, G.W. Preston, C. Sneden, L. Searle. Spectroscopic analysis of 33 of the most metal poor stars. II. Astron. J. 109, 2757 (1995).


F. Rizzuti, G. Cescutti, F. Matteucci, A. Chieffi, R. Hirschi, M. Limongi. The contribution from rotating massive stars to the enrichment in Sr and Ba of the Milky Way. Mon. Not. R. Astron. Soc. 489, 5244 (2019).


D. Rassi, K.J. Ross. The ejected-electron spectrum of barium vapour autoionising and Auger levels excited by 20-500 eV electrons. J. Phys. B: Atom. Molec. Phys. 13, 4683 (1980).


S. Okudaira. Multiple ionization of Ca, Sr and Ba by electron impact. J. Phys. Soc. Jap. 29, 409 (1970).


J-M. Dettmann, F. Karstensen. Absolute ionization functions for electron impact with barium. J. Phys. B 15, 287 (1982).


A. M¨antykentt¨a, H. Aksela, S. Aksela, A. Yagishita, E. Shigemasa. Configuration interaction and shakeup satellites in 4d, 5s, and 5p photoelectron spectra of Cs and Ba. J. Phys. B: At. Mol. Opt. Phys. 25, 5315 (1992).


J. Nienhaus, O.I. Zatsarinny, W. Mehlhorn. Experimental and theoretical Auger and autoionization spectra for electron Impact on laser-excited Ba atoms. Physics Essays 13, 307 (2000).


G. Snell, M. Martins, E. Kukk, W.T. Cheng, N. Berrah. High-resolution electron spectroscopy of a strongly correlated system: Atomic barium. Phys. Rev. A 63, 062715 (2001).


A.A. Borovik. An electron spectrometer for studying the autoionization processes in metal vapors. Ukr. J. Phys. 53, 1021 (2008).

E.G. Berezhko, N.M. Kabachnik. Theoretical study of inner-shell alignment of atoms in electron impact ionisation: angular distribution and polarisation of X-rays and Auger electrons. J. Phys. B: At. Mol. Phys. 10, 2467 (1977).


O. Borovik. Electron-impact ionization of the 4p6 subshell in strontium. J. Phys. B: At. Mol. Opt. Phys. 55, 245202 (2022).


V. Hrytsko, G. Kereviˇcius, A. Kupliauskien˙e, A. Borovik. The 5p autoionization spectra of Ba atoms excited by electron impact: identification of lines. J. Phys. B: At. Mol. Opt. Phys. 49, 145201 (2016).


V. Borovik, V. Hrytsko, I. Shafranyosh, O. Borovik. Electron-impact excitation of the 5p55d6s2 autoionizing states in Ba atom. Ukr. J. Phys. 65, 12 (2020).





How to Cite

Borovik, O. (2024). Excitation Dynamics of the 5p^6 Auger Spectra in Ba + e^– Collisions. Ukrainian Journal of Physics, 69(5), 300. https://doi.org/10.15407/ujpe69.5.300



Optics, atoms and molecules