Highly-resolved (2+1) nonlinear resonantly-enhanced multiphoton ionization of supersonically jet-cooled H2O and D2O molecules

Watheq Al-Basheer

doi:10.1117/12.2553314

1 April 2020 Highly-resolved (2+1) nonlinear resonantly-enhanced multiphoton ionization of supersonically jet-cooled H₂O and D₂O molecules

Watheq Al-Basheer

Author Affiliations +

Proceedings Volume 11358, Nonlinear Optics and its Applications 2020; 113581S (2020) https://doi.org/10.1117/12.2553314
Event: SPIE Photonics Europe, 2020, Online Only

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.

Conference Presentation

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Watheq Al-Basheer "Highly-resolved (2+1) nonlinear resonantly-enhanced multiphoton ionization of supersonically jet-cooled H₂O and D₂O molecules", Proc. SPIE 11358, Nonlinear Optics and its Applications 2020, 113581S (1 April 2020); https://doi.org/10.1117/12.2553314

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