Aufsatz
Femtosecond real-time probing of reactions. 13. Multiphoton dynamics of IHgI
Zusammenfassung
Real-time studies of the dynamics were performed on the reaction of HgI_2 in a molecular beam. Excitation was by either one or multi pump photons (311 nm), leading to two separate sets of dynamics, each of which could be investigated by a time-delayed probe laser (622 nm) that ionized the parent molecule and the fragments by REMPI processes. These dynamics were distinguished by combining the information from transients taken at each mass (HgI_2, HgI, I_2, Hg, and I) with the results of pump (and probe) power dependence studies on each mass. A method of plotting the slope of the intensity dependence against the pump-probe time delay proved essential. In the preceding publication, we detailed the dynamics of the reaction initiated by a one photon excitation to the A-continuum. Here, we present studies of higher-energy states. Multiphoton excitation accesses predissociative states of HgI_2, for which there are crossings into the symmetric and asymmetric stretch coordinates. The dynamics of these channels, which lead to atomic (I or Hg) and diatomic (HgI) fragments, are discussed and related to the nature of the intermediates along the reaction pathway.
Zitierform
In: Journal of physical chemistry. Washington, DC : American Chemical Society. 97 (1993), S. 12460-12465Sammlung(en)
Publikationen (Experimentalphysik III - Femtosekundenspektroskopie und ultraschnelle Laserkontrolle)Zitieren
@article{urn:nbn:de:hebis:34-2008102724814,
author={Pedersen, S. and Baumert, Thomas and Zewail, Ahmed Hassan},
title={Femtosecond real-time probing of reactions. 13. Multiphoton dynamics of IHgI},
year={1993}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 1993$n1993 1500 1/eng 2050 ##0##urn:nbn:de:hebis:34-2008102724814 3000 Pedersen, S. 3010 Baumert, Thomas 3010 Zewail, Ahmed Hassan 4000 Femtosecond real-time probing of reactions. 13. Multiphoton dynamics of IHgI / Pedersen, S. 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/urn:nbn:de:hebis:34-2008102724814=x R 4204 \$dAufsatz 4170 7136 ##0##urn:nbn:de:hebis:34-2008102724814
2008-10-27T09:54:05Z 2008-10-27T09:54:05Z 1993 0022-3654 0092-7325 urn:nbn:de:hebis:34-2008102724814 http://hdl.handle.net/123456789/2008102724814 685891 bytes application/pdf eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ 530 Femtosecond real-time probing of reactions. 13. Multiphoton dynamics of IHgI Aufsatz Real-time studies of the dynamics were performed on the reaction of HgI_2 in a molecular beam. Excitation was by either one or multi pump photons (311 nm), leading to two separate sets of dynamics, each of which could be investigated by a time-delayed probe laser (622 nm) that ionized the parent molecule and the fragments by REMPI processes. These dynamics were distinguished by combining the information from transients taken at each mass (HgI_2, HgI, I_2, Hg, and I) with the results of pump (and probe) power dependence studies on each mass. A method of plotting the slope of the intensity dependence against the pump-probe time delay proved essential. In the preceding publication, we detailed the dynamics of the reaction initiated by a one photon excitation to the A-continuum. Here, we present studies of higher-energy states. Multiphoton excitation accesses predissociative states of HgI_2, for which there are crossings into the symmetric and asymmetric stretch coordinates. The dynamics of these channels, which lead to atomic (I or Hg) and diatomic (HgI) fragments, are discussed and related to the nature of the intermediates along the reaction pathway. open access In: Journal of physical chemistry. Washington, DC : American Chemical Society. 97 (1993), S. 12460-12465 Pedersen, S. Baumert, Thomas Zewail, Ahmed Hassan Extern
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