Rotational state-selective photofragmentation of CD3I at 266 nm: determination of the transition dipole matrix

L. C. Pipes; Dae Young Kim; N. R. Brandstater; Delroy Alphonso Baugh

doi:10.1117/12.220833

18 September 1995 Rotational state-selective photofragmentation of CD₃I at 266 nm: determination of the transition dipole matrix

L. C. Pipes, Dae Young Kim, N. R. Brandstater, Delroy Alphonso Baugh

Author Affiliations +

Proceedings Volume 2548, Laser Techniques for State-Selected and State-to-State Chemistry III; (1995) https://doi.org/10.1117/12.220833
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The photofragmentation of rovibrational energy-level selected and magnetic-state polarized (X¹A₁) CD₃I was performed at 266 nm. The relative NK) rotational energy-level populations and the angular momentum polarization of the vibrationless (X²A₂') CD₃ photofragment were measured by (2 + 1) resonance-enhanced multiphoton ionization. The magnitude and relative phase of the transition dipole matrix (or T-matrix) were determined by relating the initial system (CD₃I plus photon) alignment to the experimentally measured alignment for the CD₃ fragment. This is believed to be the first reported measurement of the T-matrix elements for a chemical reaction. This is significant since the transition dipole matrix is the most fundamental observable for a photochemical reaction and as such it is the definitive quantity with which to judge the viability of various theoretical models used to describe photochemical reactions.

Citation Download Citation

L. C. Pipes, Dae Young Kim, N. R. Brandstater, and Delroy Alphonso Baugh "Rotational state-selective photofragmentation of CD₃I at 266 nm: determination of the transition dipole matrix", Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); https://doi.org/10.1117/12.220833

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