| Autor: |
Ticich, T. M., Likar, M. D., Dübal, H.-R., Butler, L. J., Crim, F. F. |
| Předmět: |
|
| Zdroj: |
Journal of Chemical Physics; 11/15/1987, Vol. 87 Issue 10, p5820, 10p |
| Abstrakt: |
Vibrationally mediated photodissociation is a means of studying the spectroscopy of bound vibrational overtone states and of probing the electronic photodissociation dynamics of highly vibrationally excited molecules. In these experiments, a highly vibrationally excited hydrogen peroxide molecule prepared by initial excitation in the region of the third (4νOH) or fourth (5νOH) overtone of the OH stretching vibration absorbs an additional photon to dissociate to OH fragments whose individual quantum state populations are measured by laser induced fluorescence. This technique is a means of obtaining excitation spectra for bound highly vibrationally excited states and confirms the accuracy of a model that incorporates the role of the torsional vibration in the vibrational overtone spectroscopy. The photodissociation dynamics of highly vibrationally excited molecules are substantially different from those observed for dissociation by single photons of comparable or greater energy. Approximately 11% of the OH fragments formed in the vibrationally mediated photodissociation through 4νOH are vibrationally excited as compared to an unobservable amount (≤2%) in the single photon ultraviolet dissociation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
