On the Role of Penning Ionization in Photoassociation Spectroscopy

Details On the Role of Penning Ionization in Photoassociation Spectroscopy On the Role of Penning Ionization in Photoassociation Spectroscopy

2006-03-31

arxiv.org/abs/physics/0603268v1

Physics

Atomic Physics

14 pages, 18 figures, submitted to the special issue on Cold Molecules of J. Phys. B

Scientific paper

10.1088/0953-4075/39/19/S02

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.

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