Mass-ratio dependent strong-field dissociation of artificial helium hydride isotopologues
| Autor: | F Oppermann, S Mhatre, S Gräfe, M Lein |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 2023 |
| Předmět: |
time-dependent Schrödinger equation
Atomic Physics (physics.atom-ph) helium hydride molecular ion helium hydride molecular FOS: Physical sciences strong laser fields ddc:530 Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik Condensed Matter Physics laser-induced dissociation Atomic and Molecular Physics and Optics Physics - Atomic Physics |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics 56 (2023), Nr. 11 Journal of Physics B: Atomic, Molecular and Optical Physics |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/1361-6455/accb75 |
| Popis: | We study the effect of the nuclear-mass ratio in a diatomic molecular ion on the dissociation dynamics in strong infrared laser pulses. A molecular ion is a charged system, in which the dipole moment depends on the reference point and therefore on the position of the nuclear center of mass, so that the laser-induced dynamics is expected to depend on the mass asymmetry. Whereas usually both the reduced mass and the mass ratio are varied when different isotopologues are compared, we fix the reduced mass and artificially vary the mass ratio in a model system. This allows us to separate effects related to changes in the resonance frequency, which is determined by the reduced mass, from those that arise due to the mass asymmetry. Numerical solutions of the time-dependent Schr\"odinger equation are compared with classical trajectory simulations. We find that at a certain mass ratio, vibrational excitation is strongly suppressed, which decreases the dissociation probability by many orders of magnitude. Comment: 12 pages, 4 figures; submitted to Journal of Physics B on 24 Nov 2022, revised version submitted on 26 Feb 2023 |
| Databáze: | OpenAIRE |
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