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@INPROCEEDINGS{Zorn:1023117,
      author       = {Zorn, Reiner},
      title        = {{M}icroscopic {D}ynamics of {S}tructural {G}lasses
                      {I}nvestigated by {Q}uasielastic {N}eutron {S}cattering},
      reportid     = {FZJ-2024-01687},
      year         = {2022},
      abstract     = {In this presentation I will give a short introduction into
                      quasielastic neutron scattering (QENS) and its application
                      to glass-forming systems. QENS operates on time scales from
                      picoseconds to a microsecond and at the same time has a
                      spatial resolution in the Ångström range. Therefore, it
                      is well suited for the study of molecular and polymeric
                      glass-formers.The dynamics of glass-formers is still poorly
                      understood, but certain universal features can be found
                      which a theory has to explain. Foremost, there is the α
                      relaxation, which governs what is usually called ‘glass
                      transition’. Its temperature-dependence is highly
                      non-Arrhenius and the shape of correlation functions
                      non-exponential. In addition, faster relaxations may be
                      present, among which the universal ‘fast β relaxation’
                      in the picosecond range is strongly related to the α
                      relaxation in mode-coupling theory. As the fastest universal
                      process, glasses show an excess of the vibrational density
                      of states above the Debye model in the low frequency range,
                      the so-called ‘boson peak’.All these phenomena can be
                      observed by QENS with the additional information of a length
                      scale. In addition, it is possible to study them in confined
                      glass-formers in order to access their
                      system-size-dependence. Selected QENS experiments will be
                      presented and discussed.},
      month         = {Jul},
      date          = {2022-07-06},
      organization  = {The 15th International Conference on
                       Muon Spin Rotation, Relaxation and
                       Resonance, Parma (Italy), 6 Jul 2022 -
                       10 Jul 2022},
      subtyp        = {Invited},
      cin          = {JCNS-1 / IBI-8},
      cid          = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)IBI-8-20200312},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 5241 - Molecular Information Processing in
                      Cellular Systems (POF4-524) / 5251 - Multilevel Brain
                      Organization and Variability (POF4-525)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-5241 /
                      G:(DE-HGF)POF4-5251},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1023117},
}