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Proceedings Paper

Photodissociation of singlet ketene by two-step IR+UV excitation
Author(s): Michael V. Ashikhmin; Axel Mellinger; C. Bradley Moore
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Paper 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.

Paper Details

Date Published: 15 May 1998
PDF: 7 pages
Proc. SPIE 3271, Laser Techniques for State-Selected and State-to-State Chemistry IV, (15 May 1998); doi: 10.1117/12.308388
Show Author Affiliations
Michael V. Ashikhmin, Univ. of California/Berkeley and Lawrence Berkeley National Lab. (United States)
Axel Mellinger, Univ. of California/Berkeley and Lawrence Berkeley National Lab. (United States)
C. Bradley Moore, Univ. of California/Berkeley and Lawrence Berkeley National Lab. (United States)


Published in SPIE Proceedings Vol. 3271:
Laser Techniques for State-Selected and State-to-State Chemistry IV
John W. Hepburn; Robert E. Continetti; Mark A. Johnson, Editor(s)

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