Photoassociation Spectroscopy in Penning Ionization Reactions at Sub-Kelvin Temperatures
| Autor: | Wojciech Skomorowski, Yuval Shagam, Christiane P. Koch, Edvardas Narevicius |
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| Rok vydání: | 2016 |
| Předmět: |
Quantum Physics
Argon Atomic Physics (physics.atom-ph) Ab initio FOS: Physical sciences chemistry.chemical_element 010402 general chemistry 01 natural sciences Physics - Atomic Physics 0104 chemical sciences chemistry Penning ionization Ionization Metastability Excited state 0103 physical sciences Physics::Atomic and Molecular Clusters Physics::Atomic Physics Physical and Theoretical Chemistry Atomic physics Quantum Physics (quant-ph) Nuclear Experiment 010306 general physics Spectroscopy Helium |
| Zdroj: | The Journal of Physical Chemistry A. 120:3309-3315 |
| ISSN: | 1520-5215 1089-5639 |
| DOI: | 10.1021/acs.jpca.5b12586 |
| Popis: | Penning ionization reactions in merged beams with precisely controlled collision energies have been shown to accurately probe quantum mechanical effects in reactive collisions. A complete microscopic understanding of the reaction is, however, faced with two major challenges-the highly excited character of the reaction's entrance channel and the limited precision of even the best state-of-the-art ab initio potential energy surfaces. Here, we suggest photoassociation spectroscopy as a tool to identify the character of orbiting resonances in the entrance channel and probe the ionization width as a function of interparticle separation. We introduce the basic concept, using the example of metastable helium and argon, and discuss the general conditions under which this type of spectroscopy will be successful. |
| Databáze: | OpenAIRE |
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