Utilization of stimulated Raman excitation and coherent anti-stokes Raman scattering in studies of bond- and mode-selective chemistry

T. Arusi-Parpar, Y. Cohen, D. David, I. Bar, S. Rosenwaks

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The state resolved photodissociation of rovibrational states of the fundamental symmetric stretch of water, H2O (1,0,0), and of the O-H or O-D stretch vibrations of HOD was studied using laser induced fluorescence and Doppler polarization spectroscopy. The control that the initially selected state exerts over the product state distribution, vector correlations and bond selectivity was demonstrated. The specific energy deposition via the lowest level of vibrational excitation leads to the enhancement of bond breaking and to structured rotational state distributions of the OH fragment which depends on the prepared rotational state of the parent. The correlations are close to the maximum attainable values expected for an idealized orientation where the transition dipole moment of the parent is parallel to the fragment angular momentum and perpendicular to its velocity. The photodissociation of HOD in which the O-H stretch is initially excited, leads to enhanced bond breaking and selective production of OD + H, while when the O-D is excited no enhancement is obtained. These results show that experiments which prepare the parent molecule in a particular state before a second laser dissociates it, provide a powerful means for bond- and mode-selective chemistry and molecular dynamics studies.

Original languageEnglish
Title of host publicationJournal De Physique
PublisherPubl by Editions de Physique
Pages725-728
Number of pages4
Edition4
ISBN (Print)2868832202, 9782868832207
DOIs
StatePublished - 1 Jan 1994
EventProceedings of the 3rd International Laser M2P Conference - Lyon, Fr
Duration: 8 Dec 199310 Dec 1993

Publication series

NameJournal De Physique
Number4
Volume4
ISSN (Print)1155-4339

Conference

ConferenceProceedings of the 3rd International Laser M2P Conference
CityLyon, Fr
Period8/12/9310/12/93

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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