Angular distribution of characteristic radiation following the excitation of He-like uranium in relativistic collisions

  • In this paper, we present an experimental and theoretical study of excitation processes for the heaviest stable helium-like ion, that is, He-like uranium occurring in relativistic collisions with hydrogen and argon targets. In particular, we concentrate on angular distributions of the characteristic Kα radiation following the K → L excitation of He-like uranium. We pay special attention to the magnetic sub-level population of the excited 1s2lj states, which is directly related to the angular distribution of the characteristic Kα radiation. We show that the experimental data can be well described by calculations taking into account the excitation by the target nucleus as well as by the target electrons. Moreover, we demonstrate for the first time an important influence of the electron-impact excitation process on the angular distributions of the Kα radiation produced by excitation of He-like uranium in collisions with different targets.

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Author:Alexandre GumberidzeORCiDGND, Daniel B. Thorn, Andrey SurzhykovORCiDGND, Christopher J. Fontes, Dariusz Banaś, Heinrich F. Beyer, Weidong Chen, Robert Evaristo GrisentiORCiDGND, Siegbert HagmannORCiDGND, Regina Hess, Pierre-Michel HillenbrandORCiDGND, Paul IndelicatoORCiD, Christophor Kozhuharov, Michael LestinskyORCiDGND, Renate Märtin, Nikolaos PetridisGND, Roman V. Popov, Reinhold Schuch, Uwe SpillmannORCiDGND, Stanislav TashenovORCiDGND, Sergiy TrotsenkoGND, Andrzej Warczak, Günter Weber, Weiqiang Wen, Danyal Ferdinant Alexander WintersGND, Natalya WintersGND, Zhong Yin, Thomas StöhlkerORCiDGND
Parent Title (English):Atoms
Place of publication:Basel
Document Type:Article
Date of Publication (online):2021/03/25
Date of first Publication:2021/03/25
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2021/10/19
Tag:X-rays; excitation; highly-charged ions; relativistic collisions; storage rings
Issue:2, art. 20
Page Number:11
First Page:1
Last Page:11
This work was supported by the Helmholtz Alliance Program of the Helmholtz Association, contract HA216/EMMI “Extremes of Density and Temperature: Cosmic Matter in the Laboratory”. The work of C.J. Fontes was supported by the U.S. Department of Energy through the Los Alamos National Laboratory, which is operated by Triad National Security, LLC, for the National Nuclear Security Administration of U.S. Department of Energy (Contract No. 89233218CNA000001). S.T. was supported by Deutsche Forschungsgemeinschaft (DFG), contract TA 740 1-1. This work was supported by SPbSU-DFG (Grants No. and No. STO 346/5-1). R.V.P. acknowledges also the financial support from the Foundation for the advancement of theoretical physics and mathematics “BASIS”.
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 4.0