Scattering! Soft, functional and quantum materials : lecture notes of the 50th IFF Spring School 2019 / Manuel Angst, Thomas Brückel, Stephan Förster, Karen Friese, Reiner Zorn (eds.) ; this Spring School was organized by the Institutes JCNS, PGI, ICS and IAS of the Forschungszentrum Jülich on 11 until 22 March 2019