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Hyperfine-induced depolarization effect in the X-ray line emission \(\mathrm {1s2p\,^3P_2\!\rightarrow \!1s^2\,^1S_0}\) of He-like ions

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Abstract

The degree of linear polarization of the line x corresponding to the transition \(\mathrm {1s2p\,^3P_2\!\rightarrow \!1s^2\,^1S_0}\) is considered for Helium-like ions with non-zero nuclear spin. We are interested in this paper to seven ions: P\(^{13+}\), V\(^{21+}\), Mn\(^{23+}\), As\(^{31+}\), Rb\(^{35+}\), Y\(^{35+}\) and Nb\(^{39+}\) which are excited by electrons beam. In such ions, two kind of transitions occurs in the line x: the hyperfine-induced electric dipole E1 transition and the magnetic quadrupole M2 transition. From our results, we find that when we take into account this two kind of transitions without interference between the two channels E1 and M2, this leads to a drastic depolarization. However, the consideration of the interference effect leads to an increase in the polarization degree, slight for the whole line x and substantial for its individual hyperfine components.

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Data Availability Statement

This manuscript has no associated data, or the data will not be deposited. [Authors’ comment: No supplementary data are needed for the verfication of research results.]

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Acknowledgements

Dr A K FEROUANI gratefully acknowledges the DGRSDT, Algerian Ministry of Higher Education and Research, under Project PRFU code B00L02UN130120190002.

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Authors and Affiliations

  1. L.P.T, Département de Physique, Faculté des Sciences, Université A. Belkaid, 13000, Tlemcen, Algeria

    R. Bensaid, A. K. Ferouani & M. Sahlaoui

  2. Ecole Supérieure en Sciences Appliquées, B.P 165 RP Bel Horizon, 13000, Tlemcen, Algeria

    A. K. Ferouani & M. Sahlaoui

Authors
  1. R. Bensaid
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  2. A. K. Ferouani
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  3. M. Sahlaoui
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Contributions

RB and AKF jointly started the project, RB performed the calculations, AKF assisted in calculations, AKF, RS and MS analyzed the results and wrote the manuscript. All authors participated in discussion and reviewed the manuscript before submission.

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Correspondence to R. Bensaid.

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Bensaid, R., Ferouani, A.K. & Sahlaoui, M. Hyperfine-induced depolarization effect in the X-ray line emission \(\mathrm {1s2p\,^3P_2\!\rightarrow \!1s^2\,^1S_0}\) of He-like ions. Eur. Phys. J. D 75, 177 (2021). https://doi.org/10.1140/epjd/s10053-021-00190-9

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  • DOI: https://doi.org/10.1140/epjd/s10053-021-00190-9

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