Interference effects due to nuclear motion of the hydrogen molecule
| Autor: | C. R. de Carvalho, Italo Prazeres, François Impens, N. V. de Castro Faria, Amanda Alencar, Jacques Robert, L. O. Santos, Ginette Jalbert |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Quantum Physics Angular momentum Atomic Physics (physics.atom-ph) Nuclear motion Hydrogen molecule FOS: Physical sciences 01 natural sciences Molecular physics Dissociation (chemistry) Coincidence Physics - Atomic Physics 010305 fluids & plasmas 0103 physical sciences Molecule Quantum Physics (quant-ph) 010306 general physics Quantum Electron ionization |
| Zdroj: | Physical Review A. 98 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.98.052136 |
| Popis: | We show that two-particle interferences can be used to probe the nuclear motion in a doubly-excited hydrogen molecule. The dissociation of molecular hydrogen by electron impact involves several decay channels, associated to different molecular rotational states, which produce quantum interferences in the detection of the atomic fragments. Thanks to the correlations between the angular momentum and vibrational states of the molecule, the fragments arising from each dissociation channel carry out a phase-shift which is a signature of the molecule rotation. These phase-shifts, which cannot be observed in a single-atom detection scheme, may be witnessed in realistic experimental conditions in a time-of-flight coincidence measurement. We analyse the interferences arising from the two lowest-energy rotational states of a para-hydrogen molecule. Our result shows the relevance of two-fragments correlations to track the molecular rotation. 5 pages, 3 Figures. Submitted |
| Databáze: | OpenAIRE |
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