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@ARTICLE{Arbe:24202,
      author       = {Arbe, A. and Colmenero, J. and Alvarez, F. and Monkenbusch,
                      M. and Richter, D. and Farago, B. and Frick, K. H.},
      title        = {{N}on-{G}aussian nature of the alpha-relaxation of
                      glass-forming polyisoprene},
      journal      = {Physical review letters},
      volume       = {89},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-24202},
      pages        = {245701},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We report quasielastic neutron scattering experiments
                      exploring the alpha relaxation in polyisoprene over an
                      unprecedented range in momentum transfer. Corroborating and
                      validating earlier molecular dynamics simulations, the
                      measurements reveal a crossover from a Gaussian regime of
                      sublinear diffusion to a strongly non-Gaussian regime at
                      short distances. We show that a consistent interpretation in
                      terms of a distribution of finite jumps underlying the alpha
                      process is possible. This model leads to a time-dependent
                      non-Gaussian parameter exhibiting all features revealed so
                      far from various simulations.},
      keywords     = {J (WoSType)},
      cin          = {IFF-NST},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB34},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK242},
      shelfmark    = {Physics, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000179484700027},
      doi          = {10.1103/PhysRevLett.89.245701},
      url          = {https://juser.fz-juelich.de/record/24202},
}