Control of Ultracold Photodissociation with Magnetic Fields
| Autor: | Bart H. McGuyer, Tanya Zelevinsky, I. Majewska, Stanimir Kondov, Mickey McDonald, Robert Moszynski, Chih-Hsi Lee |
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| Rok vydání: | 2018 |
| Předmět: |
Chemical Physics (physics.chem-ph)
Physics Quantum Physics 010304 chemical physics Atomic Physics (physics.atom-ph) Photodissociation FOS: Physical sciences General Physics and Astronomy 7. Clean energy 01 natural sciences Diatomic molecule Quantum chemistry Physics - Atomic Physics Magnetic field Physics - Chemical Physics 0103 physical sciences Physics::Atomic and Molecular Clusters Molecule Physics::Atomic Physics Physics::Chemical Physics Atomic physics Quantum Physics (quant-ph) 010306 general physics Quantum |
| Zdroj: | Physical Review Letters. 120 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.120.033201 |
| Popis: | Photodissociation of a molecule produces a spatial distribution of photofragments determined by the molecular structure and the characteristics of the dissociating light. Performing this basic chemical reaction at ultracold temperatures allows its quantum mechanical features to dominate. In this regime, weak applied fields can be used to control the reaction. Here, we photodissociate ultracold diatomic strontium in magnetic fields below 10 G and observe striking changes in photofragment angular distributions. The observations are in excellent qualitative agreement with a multichannel quantum chemistry model that includes nonadiabatic effects and predicts strong mixing of partial waves in the photofragment energy continuum. The experiment is enabled by precise quantum-state control of the molecules. 8 pages, 3 figures |
| Databáze: | OpenAIRE |
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