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@ARTICLE{Looshorn:644620,
      author       = {Looshorn, Mirko and Doehring, Michel and Hillenbrand,
                      Pierre-Michel and Martins, Michael and Mueller, Alfred and
                      Reinwardt, Simon and Seltmann, Jörn and Trinter, Florian
                      and Wang, Shuxing and Sahoo, Aloka Kumar and Fritzsche,
                      Stephan and Schippers, Stefan},
      title        = {{D}ouble to {T}enfold {M} -shell {P}hotoionization of
                      {S}ingly {C}harged {L}anthanum {I}ons},
      journal      = {The astrophysical journal / Part 1},
      volume       = {997},
      number       = {2},
      issn         = {0004-637X},
      address      = {London},
      publisher    = {Institute of Physics Publ.},
      reportid     = {PUBDB-2026-00453},
      pages        = {199},
      year         = {2026},
      abstract     = {Using the photon-ion merged-beams technique at the
                      $PETRA\,III$ synchrotron light source, we have measured
                      cross sections for double and up to tenfold photoionization
                      of La$^{+}$ ions by a single photon in the energy range
                      820--1400~eV, where resonances and thresholds occur that are
                      associated with the excitation or ionization of one
                      $M$-shell electron. These cross sections represent
                      experimental benchmark data for the further development of
                      quantum theoretical methods, which will have to provide the
                      bulk of the atomic data required for the modeling of
                      nonequilibrium plasmas such as kilonovae. In the present
                      work, we have upgraded the Jena Atomic Calculator (JAC) and
                      pushed the state-of-the-art of quantum calculations for
                      heavy many-electron systems to new limits. In particular, we
                      have performed large-scale calculations of the La$^+$
                      photoabsorption cross section and of the deexcitation
                      cascades, which set in after the initial creation of a $3d$
                      hole. Our theoretical results largely agree with our
                      experimental findings. However, our theoretical product-ion
                      charge state distributions are somewhat narrower than the
                      experimental ones, which is most probably due to the
                      simplifications necessary to keep the cascade calculations
                      tractable.},
      cin          = {DOOR ; HAS-User / FS-PET-S / U HH},
      ddc          = {520},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-PET-S-20190712
                      / $I:(DE-H253)U_HH-20120814$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613) /
                      6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20220443
                      (I-20220443) / DFG project G:(GEPRIS)510114039 -
                      Dissoziationsdynamik von rumpfniveauangeregten ionischen,
                      molekularen Radikalen (510114039) / DFG project
                      G:(GEPRIS)509471550 - Dynamik photoionisations-induzierter
                      Prozesse in laser-präparierten Molekülen in der Gasphase
                      und der wässrigen Phase (509471550)},
      pid          = {G:(DE-HGF)POF4-613 / G:(DE-HGF)POF4-6G3 /
                      G:(DE-H253)I-20220443 / G:(GEPRIS)510114039 /
                      G:(GEPRIS)509471550},
      experiment   = {EXP:(DE-H253)P-P04-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.3847/1538-4357/ae3089},
      url          = {https://bib-pubdb1.desy.de/record/644620},
}