Resonant four-wave mixing spectra: A fresh look at photodissociation dynamics

A. Kouzov, P. Radi, P. Maksyutenko, D. Kozlov

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Frequency- and polarization-resolved degenerate resonant four-wave mixing is used for the first time to study the rotational anisotropy of the OH radicals produced by photolysis of H2O2 by a plane-polarized laser radiation at 266 nm. For that, a flexible polarization setup is designed to directly isolate the rotationally anisotropic signals in the A2Σ+X2Π(0; 0) OH vibronic band. The results are quantitatively interpreted by using the line-space approach and accounting for all possible correlations between the electric field ED of the photolysis laser, the recoil velocity v and the angular momentum J of nascent particles. In so doing, the resonance amplitudes are decoupled into products of the polarization factors, the Doppler-broadened profiles and the Einstein B-coefficients. The anisotropic signals have characteristic shapes of well resolved Doppler doublets providing a direct evidence of translational helicity of the nascent OH radicals, a hitherto exprementally inaccessible key characteristic of the photo
Original languageEnglish
Pages (from-to)012016_1-5
JournalJournal of Physics: Conference Series
Volume548
Issue number1
DOIs
StatePublished - 2014

Keywords

  • Four-wave mixing
  • photodissociation

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