The stereochemistry of the O(1D)+N2O→NO+NO reaction via velocity-aligned photofragment dynamics

Abstract

Velocity-aligned, superthermal O(1D) atoms generated via the photodissociation of N2O have been employed to investigate the stereodynamics of the title reaction. The power of this experimental technique, when coupled with Doppler-resolved, polarized laser-induced fluorescence probing of the reaction products, is demonstrated by reference to the specific reaction channel leading to NO(υ′=0)+NO(υ′=16,17), which is shown to proceed via direct stripping dynamics. Furthermore, the observed product-state selective linear and angular momenta disposals imply that the reaction is stereodynamically constrained to occur via collinear collision geometries.

Product rotational polarization: Stereodynamics of the reaction Cl(2P3/2)+CD4(v=0,j=0)→DCl(v′=0,j′=1)+CD3

“…These techniques motivate the interest to measure features of the k-kЈ -JЈ distribution in probing the product state selective dynamics of photoninitiated bimolecular reactions and have been successfully exploited by a number of groups to determine product stateselective differential cross sections with high precision. 16,17 Measurements have been performed either under thermal conditions 18,19 or, with potentially higher collision energy and angular resolution, under jet cooled expansion conditions. [20][21][22] The enhanced reagent number densities achieved using these techniques, compared with those typically obtained in conventional crossed-molecular beam methods, have now enabled full state-to-state differential cross sections to be measured for the ClϩCH 4 reaction.…”

Direct Measurement of the Three-Dimensional Product Velocity Distribution from Photoinitiated Bulb Reactions

“…13) Two adjustments must be made before the calculated TOF profile, gal&), can be compared to experimental data. First, a small correction is made for the time it takes for the ion to travel the small distance between the end of the TOF tube and the detector.…”

Angular momenta correlation in kinematically constrained reactions: application to the Ba + HI → BaI + H system

“…Typical examples of beam work include the application of the laser induced fluorescence method [3] as well as the measurement of the chemiluminescence [4] of reaction products to unravel the product rotational alignment. On the other hand, recent applications of laser photodissociation techniques [5][6][7][8][9] carried out in a bulb have provided interesting data on product rotational alignment, second moments of the differential cross-section, and other state-resolved vector correlation by using the laser induced fluorescence method [5][6][7][8]. Of particular interest is the study of light atom exchange reactions, the so-called heavy plus heavy-light reactions.…”