Femtosecond Electron Diffraction Study of the Cyclization Reaction in Crystalline Diarylethene H. Jean–Ruel, M. Gao, C. Lu, L. Liu, G. Moriena, R. R. Cooney, M. A. Kochman, C. A. Morrison, G. Sciaini and R. J. D. Miller EPJ Web of Conferences, 41 (2013) 05033 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134105033