| Autor: |
Stert, V., Ritze, H.-H., Hertel, I. V., Radloff, W. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 9/28/2006, Vol. 125 Issue 12, p124312, 6p, 1 Chart, 6 Graphs |
| Abstrakt: |
Ultrafast dissociation dynamics in OClO molecules is studied, induced by femtosecond laser pulses in the wavelength region from 386 to 409 nm, i.e., within the wide absorption band to the à 2A2 electronic state. The decay of the initially excited state due to nonadiabatic coupling to the close lying 2A1 and 2B2 electronic states proceeds with a time constant increasing from 4.6 ps at 386 nm to 30 ps at 408.5 nm. Dissociation of the OClO molecule occurs after internal conversion within about 250 fs. In addition, a minor channel of direct excitation of the 2A1 electronic state has been identified, the lifetime of which increases from a few 100 fs at 386 nm to 2.2 ps at 408.5 nm. Simultaneous excitation of two neighboring vibrational bands in the à 2A2 state leads to a coherent oscillation of the parent ion signal with the frequency difference of both modes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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