| DOI | Trouver le DOI : https://doi.org/10.1063/1.2403137 |
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| Auteur | Rechercher : Townsend, Dave1; Rechercher : Satzger, Helmut1; Rechercher : Ejdrup, Tine; Rechercher : Lee, Anthony M. D.1; Rechercher : Stapelfeldt, Henrik; Rechercher : Stolow, Albert1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut Steacie des sciences moléculaires du CNRC
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| Format | Texte, Article |
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| Sujet | carbon compounds; molecule-photon collisions; photoelectron spectra; photoionisation; predissociation; spin-orbit interactions; time resolved spectra; triplet state |
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| Résumé | The authors report time resolved photoelectron spectra of the 1B2 (1Σu+) state of CS2 at pump wavelengths in the region of 200 nm. In contrast to previous studies, the authors find that the predissociation dynamics is not well described by a single exponential decay. Biexponential modeling of the authors' data reveals a rapid decay pathway (tau<50 fs), in addition to a longer lived channel (τ ∼ 350-650 fs) that displays a marked change in apparent lifetime when the polarization of the pump laser is rotated with respect to that of the probe. Since the initially populated 1B2(1Σu+) state may decay to form either S(1D) or S(3P) products (the latter produced via a spin-orbit induced crossing from a singlet to a triplet electronic surface), this lifetime observation may be rationalized in terms of changes in the relative ionization cross section of these singlet and triplet states of CS2 as a function of laser polarization geometry. The experimentally observed lifetime of the longer lived channel is therefore a superposition of these two pathways, both of which decay on very similar time scales. |
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| Date de publication | 2006-12-18 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 12330126 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | fb7570e4-83a5-44b2-91f0-ba2183eb8029 |
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| Enregistrement créé | 2009-09-10 |
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| Enregistrement modifié | 2020-04-22 |
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