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@MASTERSTHESIS{Smitmanns:907315,
      author       = {Smitmanns, Hendrik},
      title        = {{M}easurements of {T}ransitions between {D}ifferent
                      {H}yperfine {S}tructure {S}ubstates of {H}ydrogen using a
                      {S}ona {T}ransition {U}nit},
      school       = {RWTH Aachen},
      type         = {Masterarbeit},
      reportid     = {FZJ-2022-01958},
      pages        = {71},
      year         = {2022},
      note         = {Masterarbeit, RWTH Aachen, 2022},
      abstract     = {Nuclear spin polarization and its phenomena have been
                      studied since the early days of quantum mechanics. Today, in
                      particular, nuclear spin polarized hydrogenand deuterium are
                      used in many ways, e.g. as target material or in the form of
                      polarized beams. One way of measuring the polarization of
                      such a beam is the Lambshiftpolarimeter. In an experiment
                      conducted at the Institut für Kernphysik of the
                      Forschungszentrum Jülich to study the influence of a Sona
                      transition unit on thepolarization of a nuclear
                      spin-polarized hydrogen beam, unexpected oscillations of the
                      occupation numbers of different hyperfine substates of
                      hydrogen atoms as a functionof the magnetic field were
                      discovered. The oscillations are induced within the Sona
                      transition unit, which allows an exchange of the occupation
                      numbers of the alpha 1 andbeta3 states by reversing the
                      direction of the magnetic field defining the quantization
                      axis.The transition energies between the different substates
                      were in the range of only a few neV. In order to investigate
                      this phenomenon further, a similar experiment is set up in
                      Jülich which allows measuring these oscillations of the
                      occupation numbers of metastable $2S_1/2$ hydrogen as well
                      as the recording of the thereby produced spectra of the two
                      alpha states. In addition, an analysis method is developed
                      and applied to determine the energies of the transitions
                      that occur between the different substates. The aim of the
                      method is to measure these transition energies with an
                      accuracy that allows the QED corrections to the classical
                      Breit-Rabi formula to be detected.},
      cin          = {IKP-2 / PGI-6 / IKP-4},
      cid          = {I:(DE-Juel1)IKP-2-20111104 / I:(DE-Juel1)PGI-6-20110106 /
                      I:(DE-Juel1)IKP-4-20111104},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)19},
      url          = {https://juser.fz-juelich.de/record/907315},
}