NASSAU 2006

This volume contains the proceedings of the 4th Nassau Mössbauer Symposium, held in Garden City, NY, USA in January 2006. The conference and its proceedings are dedicated to one of the pioneers of Mössbauer Spectroscopy, the late Dr. Stanley Ruby, whose original ideas, insight and enthusiasm helped create new research fields. The volume reports on the progress in various areas of applications of Mössbauer Effect.