Weinhardt, L.; Weigand, M.; Fuchs, O.; Bär, M.; Blum, M.; Denlinger, J.D.; Yang, W.; Umbach, E.; Heske, C.: Nuclear dynamics in the core-excited state of aqueous ammonia probed by resonant inelastic soft x-ray scattering. Physical Review B 84 (2011), p. 104202/1-6
10.1103/PhysRevB.84.104202
Abstract:
The electronic structure of aqueous NH3 and ND3 has been investigated using resonant inelastic soft x-ray scattering. Spectral features of different processes involving nuclear dynamics in the core-excited state can be identified. When exciting into the lowest core-excited state, we find a strong isotope effect and clear evidence for ultra-fast proton dynamics. Furthermore, a strong vibronic coupling is observed and, in the case of aqueous NH3, a vibrational fine structure can be resolved.