Abstract
Ion beam analysis (IBA) methods always rely on available differential cross section data to obtain quantitative results about composition and structure of the near-surface layer of a sample. In order to meet the nuclear data needs of the IBA community, the Coordinated Research Project (CRP) ``Development of a Reference Database for Ion Beam Analysis'' was initiated by the IAEA in 2005 and will be concluded in 2010. A summary of the results of this IAEA Coordinated Research Project activity is presented, problems still existing in the field are discussed, and ways to further develop nuclear data for IBA are indicated.