Predissociation and autoionization of triplet Rydberg states in molecular hydrogen
| Autor: | Laura Dinu, Wim J. van der Zande, Yan J. Picard |
|---|---|
| Přispěvatelé: | Laboratoire des collisions atomiques et moléculaires (LCAM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Geurts, Mireille |
| Rok vydání: | 2004 |
| Předmět: |
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]
010304 chemical physics Field (physics) Molecular and Biophysics Chemistry General Physics and Astronomy 01 natural sciences symbols.namesake Autoionization Metastability Electric field 0103 physical sciences Physics::Atomic and Molecular Clusters Rydberg formula symbols Physics::Atomic Physics [PHYS.PHYS.PHYS-ATOM-PH] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] Physical and Theoretical Chemistry Triplet state Atomic physics 010306 general physics Spectroscopy Dissociative recombination |
| Zdroj: | Journal of Chemical Physics Journal of Chemical Physics, American Institute of Physics, 2004, 121, pp.3058 Journal of Chemical Physics, 121, 3058-3068 Journal of Chemical Physics, 121, 7, pp. 3058-3068 |
| ISSN: | 0021-9606 1089-7690 |
| Popis: | Contains fulltext : 60171.pdf (Publisher’s version ) (Open Access) We present single-photon spectroscopy in molecular hydrogen starting from the metastable c(3)Pi(u)(-) state to a number of triplet nd-Rydberg states (v=0-4, n=12-20). Using fast beam spectroscopy both the autoionization channel and the predissociation channel are quantified, field free, as well as with small electric fields. Coupling with the i(3)Pi(g) state is assumed to be responsible for field-free predissociation of the v=0 Rydberg levels. The stronger observed predissociation channel of the v=1 Rydberg levels is due to the nonadiabatic interaction with the h(3)Sigma(g)(+) state in combination with l mixing due to an external electric field. No direct evidence is found for possible electric field induced predissociation of the gerade Rydberg states by low lying ungerade states. The competition between autoionization and predissociation is discussed in terms of possible consequences for dissociative recombination involving low energy electron collisions with the H-2(+) molecular ion. (C) 2004 American Institute of Physics. |
| Databáze: | OpenAIRE |
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