Photodissociation of singlet ketene by two-step IR+UV excitation

Michael V. Ashikhmin; Axel Mellinger; C. Bradley Moore

doi:10.1117/12.308388

15 May 1998 Photodissociation of singlet ketene by two-step IR+UV excitation

Michael V. Ashikhmin, Axel Mellinger, C. Bradley Moore

Proceedings Volume 3271, Laser Techniques for State-Selected and State-to-State Chemistry IV; (1998) https://doi.org/10.1117/12.308388
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

The dissociation of ketene on its singlet potential energy surface has been studied using a two-step photoexcitation, followed by state-selective detection of the CH₂ radical via laser-induced fluorescence (LIF). For the first step near 2.8 micrometers , a commercial optical parametric oscillator was actively stabilized with an external reference etalon, allowing scan durations of up to 1 hour. By tuning the wavelength of the UV photolysis laser, photofragment excitation spectra of high energy selectivity were recorded. Comparison with phase space theory calculations shows that the projection K of the angular momentum onto the molecular axis is strongly mixed for K > 0 and that for K equals 0 the extent of mixing increases with J.

Citation Download Citation

Michael V. Ashikhmin, Axel Mellinger, and C. Bradley Moore "Photodissociation of singlet ketene by two-step IR+UV excitation", Proc. SPIE 3271, Laser Techniques for State-Selected and State-to-State Chemistry IV, (15 May 1998); https://doi.org/10.1117/12.308388

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