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@ARTICLE{Rehbehn:642952,
      author       = {Rehbehn, Nils-Holger and Sajith, Lakshmi Priya
                      Kozhiparambil and Rosner, Michael K. and Cheung, Charles and
                      Porsev, Sergey G. and Safronova, Marianna S. and Worm,
                      Steven and Budker, Dmitry and Pfeifer, Thomas and Crespo
                      López-Urrutia, José R. and Bekker, Hendrik},
      title        = {{O}ptical transitions near the elusive 5⁢𝑠−4⁢𝑓
                      level crossing in highly charged osmium with sensitivity to
                      physics beyond the standard model},
      journal      = {Physical review / A},
      volume       = {112},
      number       = {6},
      issn         = {2469-9926},
      address      = {Woodbury, NY},
      publisher    = {American Physical Society},
      reportid     = {PUBDB-2025-05742},
      pages        = {L061101},
      year         = {2025},
      abstract     = {Optical transitions in highly charged ions can be very
                      sensitive to hypothetical beyond-the-standard-model
                      phenomena. Those near the degeneracy due to the
                      5⁢𝑠−4⁢𝑓 level crossing are especially promising.
                      We present measurements of Os15,16,17+ ions at an electron
                      beam ion trap and corresponding predictions of several
                      transitions that show a high sensitivity to hypothetical
                      fifth forces and possible violations of local Lorentz
                      invariance. We found electric quadrupole transitions in
                      Os16+, which are suitable for frequency metrology due to
                      linewidths down to 44µ⁢Hz. Our calculations show the need
                      for including enough inner-shell excitations to avoid an
                      overestimation of interconfiguration transition rates, which
                      were too faint for detection at the present signal-to-noise
                      ratio.},
      cin          = {$Z_DET$ / CQTA},
      ddc          = {530},
      cid          = {$I:(DE-H253)Z_DET-20201126$ / I:(DE-H253)CQTA-20221102},
      pnm          = {622 - Detector Technologies and Systems (POF4-622)},
      pid          = {G:(DE-HGF)POF4-622},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {https://link.aps.org/doi/10.1103/p347-47ys},
      url          = {https://bib-pubdb1.desy.de/record/642952},
}