Resonance enhanced multiphoton ionization (REMPI) and REMPI-photoelectron spectroscopy of ammoniaM. N.R. Ashfold, S. R. Langford, R. A. Morgan, A. J. Orr-Ewing, C. M. Western, C. R. Scheper and C. A. de LangeEur. Phys. J. D, 4 2 (1998) 189-197DOI: https://doi.org/10.1007/s100530050199