Abstract
Highly-resolved spectra of (2+1) resonance-enhanced multiphoton ionization (REMPI) for nozzle-jet expanded molecular beams of H2O and D2O molecules seeded in Ar and He gases of 1% concentration are presented. The third Harmonic output (λ=355 nm) of a seeded Q-switch Nd:YAG laser was employed to pump an OPO laser, consequently, the VUV output of frequencydoubled OPO radiation was directly used to photo-ionize the jet-cooled sample molecules. By monitoring the H2O+ and D2O+ parent ions signals, highly resolved mass and photoionization spectra were recorded by probing the C-band via a (2+1) REMPI process and over the spectral range 80400 – 81000 cm-1. In this study, highly resolved mass and REMPI spectra of the C-band of H2O and D2O will be presented. Moreover, the effect of seeding gas effect on sample molecules as well as the nature of the photoionization spectra will be discussed.
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