Femtosecond two-photon ionization of fluid NH3 at 9.3 eV Janus Urbanek, Annika Dahmen, Joel Torres-Alacan and Peter Vöhringer EPJ Web of Conferences, 41 (2013) 05027 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134105027