Abstract
A new apparatus is described for the study of photofragment spectroscopy of molecular ions in a coaxial laser-ion beam configuration. Complementary to other developments in this field, the apparatus emphasizes the kinetic energy spectroscopy of the photofragments and is particularly designed to study direct photodissociation processes via repulsive potential curves. On the laser side, the experiment uses discrete lines in the visible and UV region (Ar+ laser, excimer laser). A detailed analysis of the experimental conditions is presented, in particular with respect to the attainable energy resolution in the photofragment spectra. The apparatus provides sufficiently intense ion beams (5–10 nA) with controlled energy resolution (ΔE = 100−500 meV) and angular collimation (ΔΘ = 5−10 mrad). The measured photofragment spectra of H +2 in the visible and UV region are in full accordance with the predictions of the design analysis.
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Andrić, L., Bissantz, H., Solarte, E.R. et al. Photofragment spectroscopy of molecular ions: design and performance of a new apparatus using coaxial beams. Z Phys D - Atoms, Molecules and Clusters 8, 371–378 (1988). https://doi.org/10.1007/BF01437104
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DOI: https://doi.org/10.1007/BF01437104