Testing strong-field QED to second order in the highly correlated atomic system berylliumlike Pb78+ by electron-ion collision spectroscopy

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Schippers, S. and Brandau, C. and Fuchs, S. and Lestinsky, M. and Wang, S. X. and Zhang, C. Y. and Badnell, N. R. and Borovik, A. and Fogle, M. and Hannen, V. and Harman, Z. and Hillenbrand, P.-M. and Menz, E. B. and Zhang, Y. and Andelkovic, Z. and Herfurth, F. and Heß, R. and Kalinin, A. and Kozhuharov, C. and Krantz, C. and Litvinov, S. and Lorentz, B. and Spillmann, U. and Steck, M. and Vorobyev, G. and Banaś, D. and Fritzsche, S. and Lindroth, E. and Ma, X. and Müller, A. and Schuch, R. and Surzhykov, A. and Trassinelli, M. and Ueberholz, K. and Weinheimer, C. and Stöhlker, Th. (2025) Testing strong-field QED to second order in the highly correlated atomic system berylliumlike Pb78+ by electron-ion collision spectroscopy. Physical Review Letters, 135 (11). 113001. ISSN 1079-7114 (https://doi.org/10.1103/6j3v-lwxj)

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Abstract

A low-energy storage ring with an ultracold electron cooler has been coupled with a heavy-ion accelerator facilitating high-resolution electron-ion collision spectroscopy of the heaviest few-electron ions. In the present Letter resonant electron-ion recombination of berylliumlike Pb^{78+} ions was measured in the collision-energy range 9.3-16.5 eV and a value of 244.937(30) eV is derived for the Pb^{78+}(2s^{2} ^{1}S_{0}-2s2p ^{3}P_{1}) excitation energy. This result agrees with the most recent (less accurate) theoretical value of 244.942(52) eV [Malyshev et al., Phys. Rev. A 110, 062824 (2024)PLRAAN2469-992610.1103/PhysRevA.110.062824], which has been calculated by applying strong-field QED rigorously up to the second order. The present investigation suggests that further technical improvements can potentially increase the experimental accuracy by an order of magnitude.

ORCID iDs

Schippers, S., Brandau, C., Fuchs, S., Lestinsky, M., Wang, S. X., Zhang, C. Y. ORCID logoORCID: https://orcid.org/0000-0003-1935-6907, Badnell, N. R. ORCID logoORCID: https://orcid.org/0000-0001-7418-7996, Borovik, A., Fogle, M., Hannen, V., Harman, Z., Hillenbrand, P.-M., Menz, E. B., Zhang, Y., Andelkovic, Z., Herfurth, F., Heß, R., Kalinin, A., Kozhuharov, C., Krantz, C., Litvinov, S., Lorentz, B., Spillmann, U., Steck, M., Vorobyev, G., Banaś, D., Fritzsche, S., Lindroth, E., Ma, X., Müller, A., Schuch, R., Surzhykov, A., Trassinelli, M., Ueberholz, K., Weinheimer, C. and Stöhlker, Th.;
  • Item type:Article
    ID code:94290
    Dates:
    Date
    Event
    10 September 2025
    Published
    31 July 2025
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:26 Sep 2025 10:46
    Last modified:06 May 2026 00:22
    URI:https://strathprints.strath.ac.uk/id/eprint/94290
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