On the role of Penning ionization in photoassociation spectroscopy
| Autor: | D. Nehari, H. T. C. Stoof, P. van der Straten, D. van Oosten, E. van der Zwan |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Physics
Atomic Physics (physics.atom-ph) FOS: Physical sciences Condensed Matter Physics Laser Atomic and Molecular Physics and Optics Spectral line Physics - Atomic Physics law.invention Penning ionization law Ionization Excited state Natuur- en Sterrenkunde Physics::Atomic and Molecular Clusters Physics::Atomic Physics Atomic physics Spectroscopy Ground state Computer Science::Information Theory |
| Popis: | We study the role of Penning ionization on the photoassociation spectra of He(^3S)-He(^3S). The experimental setup is discussed and experimental results for different intensities of the probe laser are shown. For modelling the experimental results we consider coupled-channel calculations of the crossing of the ground state with the excited state at the Condon point. The coupled-channel calculations are first applied to model systems, where we consider two coupled channels without ionization, two coupled channels with ionization, and three coupled channels, for which only one of the excited states is ionizing. Finally, coupled-channel calculations are applied to photoassociation of He(^3S)-He(^3S) and good agreement is obtained between the model and the experimental results. 14 pages, 18 figures, submitted to the special issue on Cold Molecules of J. Phys. B |
| Databáze: | OpenAIRE |
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