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@ARTICLE{Busch:14703,
      author       = {Busch, P. and Rauscher, M. and Moulin, J.-F. and
                      Müller-Buschbaum, P.},
      title        = {{D}ebye-{S}cherrer rings from block copolymer films with
                      power-like order},
      journal      = {Journal of applied crystallography},
      volume       = {44},
      issn         = {0021-8898},
      address      = {Copenhagen},
      publisher    = {Munksgaard},
      reportid     = {PreJuSER-14703},
      pages        = {370 - 379},
      year         = {2011},
      note         = {CHESS is a national user facility supported by the National
                      Science Foundation and the National Institutes of
                      Health/National Institute of General Medical Sciences under
                      award No. DMR-0225180. We thank Sita Krishnan for the
                      preparation of the semifluorinated diblock copolymer sample.
                      PMB acknowledges financial support by the Deutsche
                      Forschungsgemeinschaft in project No. MU1487/6.},
      abstract     = {The powder-like orientation of lamellar domains in thin
                      films of the diblock copolymer polystyrene-block-poly(methyl
                      methacrylate) is investigated using grazing-incidence
                      small-angle X-ray scattering (GISAXS) and grazing-incidence
                      small-angle neutron scattering (GISANS). Conventional
                      monochromatic GISANS and GISAXS measurements are compared
                      with neutron time-of-flight GISANS. For angles of incidence
                      and exit larger than the critical angle of total external
                      reflection of the polymer, Debye-Scherrer rings are
                      observed. The position of the Debye-Scherrer rings is
                      described quantitatively based on a reduced version of the
                      distorted-wave Born approximation. A strong distortion of
                      the ring shape is caused by refraction and reflections from
                      the film interfaces. Close to the critical angle, the ring
                      shape collapses into a banana shape.},
      keywords     = {J (WoSType)},
      cin          = {PGI-4 / JCNS (München) ; Jülich Centre for Neutron
                      Science JCNS (München) ; JCNS-FRM-II / JCNS-1 / JCNS-2},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-4-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101 / EXP:(DE-MLZ)REFSANS-20140101},
      shelfmark    = {Crystallography},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000288758500014},
      doi          = {10.1107/S0021889810053823},
      url          = {https://juser.fz-juelich.de/record/14703},
}