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

O.O. Borovik

doi:10.15407/ujpe69.5.300

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

Authors

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

DOI:

https://doi.org/10.15407/ujpe69.5.300

Keywords:

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

Abstract

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.

References

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

https://doi.org/10.1088/0953-4075/49/6/062001

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).

https://doi.org/10.1140/epjd/e2005-00058-0

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).

https://doi.org/10.1086/117486

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).

https://doi.org/10.1093/mnras/stz2505

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).

https://doi.org/10.1088/0022-3700/13/23/024

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

https://doi.org/10.1143/JPSJ.29.409

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

https://doi.org/10.1088/0022-3700/15/2/014

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).

https://doi.org/10.1088/0953-4075/25/24/011

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).

https://doi.org/10.4006/1.3028825

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).

https://doi.org/10.1103/PhysRevA.63.062715

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).

https://doi.org/10.1088/0022-3700/10/12/025

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

https://doi.org/10.1088/1361-6455/aca942

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).

https://doi.org/10.1088/0953-4075/49/14/145201

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).

https://doi.org/10.15407/ujpe65.1.12

Downloads

Published

2024-06-26

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

Download Citation

Issue

Vol. 69 No. 5 (2024)

Section

Optics, atoms and molecules

License

Copyright Agreement
License to Publish the Paper
Kyiv, Ukraine

The corresponding author and the co-authors (hereon referred to as the Author(s)) of the paper being submitted to the Ukrainian Journal of Physics (hereon referred to as the Paper) from one side and the Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, represented by its Director (hereon referred to as the Publisher) from the other side have come to the following Agreement:

1. Subject of the Agreement.
The Author(s) grant(s) the Publisher the free non-exclusive right to use the Paper (of scientific, technical, or any other content) according to the terms and conditions defined by this Agreement.

2. The ways of using the Paper.
2.1. The Author(s) grant(s) the Publisher the right to use the Paper as follows.
2.1.1. To publish the Paper in the Ukrainian Journal of Physics (hereon referred to as the Journal) in original language and translated into English (the copy of the Paper approved by the Author(s) and the Publisher and accepted for publication is a constitutive part of this License Agreement).
2.1.2. To edit, adapt, and correct the Paper by approval of the Author(s).
2.1.3. To translate the Paper in the case when the Paper is written in a language different from that adopted in the Journal.
2.2. If the Author(s) has(ve) an intent to use the Paper in any other way, e.g., to publish the translated version of the Paper (except for the case defined by Section 2.1.3 of this Agreement), to post the full Paper or any its part on the web, to publish the Paper in any other editions, to include the Paper or any its part in other collections, anthologies, encyclopaedias, etc., the Author(s) should get a written permission from the Publisher.

3. License territory.
The Author(s) grant(s) the Publisher the right to use the Paper as regulated by sections 2.1.1–2.1.3 of this Agreement on the territory of Ukraine and to distribute the Paper as indispensable part of the Journal on the territory of Ukraine and other countries by means of subscription, sales, and free transfer to a third party.

4. Duration.
4.1. This Agreement is valid starting from the date of signature and acts for the entire period of the existence of the Journal.

5. Loyalty.
5.1. The Author(s) warrant(s) the Publisher that:
– he/she is the true author (co-author) of the Paper;
– copyright on the Paper was not transferred to any other party;
– the Paper has never been published before and will not be published in any other media before it is published by the Publisher (see also section 2.2);
– the Author(s) do(es) not violate any intellectual property right of other parties. If the Paper includes some materials of other parties, except for citations whose length is regulated by the scientific, informational, or critical character of the Paper, the use of such materials is in compliance with the regulations of the international law and the law of Ukraine.

6. Requisites and signatures of the Parties.
Publisher: Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine.
Address: Ukraine, Kyiv, Metrolohichna Str. 14-b.
Author: Electronic signature on behalf and with endorsement of all co-authors.