Abstract
We use sub-10-fs pulses at 400 nm and 15-fs pulses at 800 nm to ionize water molecules and their isotopomers HDO and D2O in a pump–probe scheme. Pulses are generated via spectral broadening of 25-fs pulses of a 1-kHz Ti:sapphire amplifier system by self-phase modulation in a noble-gas-filled hollow waveguide and subsequent compression using chirped mirrors. At this time scale vibronic excitation of the first bending mode of water in the electronic ground state by impulsive Raman scattering is possible (e.g. the fundamental bending mode of H2O: tvib=20 fs). The effect of this pre-excitation on the ionization rate is shown.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 14 May 2001 / Revised version: 24 August 2001 / Published online: 19 September 2001
Rights and permissions
About this article
Cite this article
Steinkellner, O., Wittmann, M., Korn, G. et al. Two-color pump-probe ionization spectroscopy of gaseous water enhanced by preliminary impulsive Raman excitation. Appl Phys B 73, 279–281 (2001). https://doi.org/10.1007/s003400100693
Published:
Issue Date:
DOI: https://doi.org/10.1007/s003400100693