Hyperfine-induced effects on Kα1 linear polarization following electron-impact excitation of heliumlike Tl79+ ions with nuclear spin I=1/2

Wu, Z. W.; Tian, Z. Q.; Dong, C. Z.; Surzhykov, Andrey; Fritzsche, S.

doi:https://doi.org/10.1088/1367-2630/acf8e9

Zugriffsnummer	50838
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	Hyperfine-induced effects on Kα1 linear polarization following electron-impact excitation of heliumlike Tl79+ ions with nuclear spin I=1/2
Autor(in); Institution	Wu, Z. W.; Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, CHINA; College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, CHINA Tian, Z. Q.; Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, CHINA Dong, C. Z.; Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, CHINA Surzhykov, Andrey; FPM, Fundamentale Physik für Metrologie, PTB-Braunschweig; Technische University Braunschweig, GERMANY; Laboratory for Emerging Nanometrology Braunschweig, GERMANY Fritzsche, S.; Helmholtz-Institut Jena, Jena, GERMANY; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, GERMANY; Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Jena, GERMANY
Quelle/Jahr	New Journal of Physics: 25 (2023), 1 - 12
Artikelnummer	093039
Availability	[online only]
ISSN	1367-2630 (online)
DOI	https://doi.org/10.1088/1367-2630/acf8e9
Verlag	Bristol: IOP Publishing
Freie Schlagworte	hyperfine interactions ; hyperfine-quenched transitions ; x-ray polarimetry ; electron impact excitation
Zusammenfassung	A most general density-matrix formalism is presented to investigate linear polarization of characteristic lines following electron-impact excitation of atoms or ions with arbitrary nuclear spin, which can account for depolarization of energy levels and multipole mixing of radiation fields. It is then applied to the linear polarization of the Kα1 line radiated from heliumlike ions with nuclear spin I=1/2. As an example, detailed calculations are performed for 207 81 Tl79+ ions using the multi-configurational Dirac-Fock method and relativistic distorted-wave theory. It is found that the effect of the hyperfine interaction on the linear polarization depends dominantly on impact electron energy. For low impact energies close to the excitation threshold, the hyperfine interaction results in an enhancement of the linear polarization, especially for those photons emitted perpendicularly to the impact electron beam. In contrast, such a hyperfine-induced effect diminishes quickly with increasing impact energy and vanishes at medium and high energies, which is very different from the results for the case of radiative electron capture (Surzhykov et. al. 2013 Phys. Rev. A 87 052507). The present study is experimentally accessible at both electron-beam ion traps and ion storage rings and, thus, accurate Kα1 polarization measurements at low energies can be utilized to probe the hyperfine interaction in highly charged few-electron ions.

Kostenfreier Zugang	Open Access Gold
Rechteinformation	CC BY 4.0 ; Creative Commons Attribution 4.0 License

Themenbereich der Metrologie	Zeit und Frequenz
Innovationscluster	Quantentechnologie
Geschäftsfelder	Grundlagen der Metrologie
Förderinformationen (1)	Förderername: National Natural Science Foundation of China (NSCF) Förderer ID: 0000 0001 0841 8282 Förderer ID Typ: ISNI Förderungsnummer: 12174315 ; 11804280
Förderinformationen (2)	Förderername: China Scholarship Council (CSC) Förderer ID: 0000 0004 5901 196X Förderer ID Typ: ISNI Förderungsnummer: 202008620004
Förderinformationen (3)	Förderername: Gansu Province Förderer ID: 0000 0004 1758 6538 Förderer ID Typ: ISNI Titel der Förderung: Youth Science and Technology Talent Promotion Project Förderungsnummer: GXH2020626-09
Förderinformationen (4)	Förderername: Northwest Normal University of China Förderprogramm: Key Program of the Research Ability Promotion Project Förderungsnummer: NWNU-LKQN2019-5
Förderinformationen (5)	Förderername: Gansu Province Förderer ID: 0000 0004 1758 6538 Förderer ID Typ: ISNI Titel der Förderung: Longyuan Youth Innovation and Entrepreneurship Talent Project Förderungsnummer: 2021LQGR64

Zitierung

Wu, Z. W., Tian, Z. Q., Dong, C. Z., Surzhykov, A., & Fritzsche, S. (2023). Hyperfine-induced effects on Kα1 linear polarization following electron-impact excitation of heliumlike Tl79+ ions with nuclear spin I=1/2. New Journal of Physics, 25, 1–12. https://doi.org/10.1088/1367-2630/acf8e9

Exportieren

RIS BibTeX

Zitierung

Exportieren

PTB-Publica Menü