Details
| Original language | English |
|---|---|
| Article number | 115101 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 56 |
| Issue number | 11 |
| Publication status | Published - 4 May 2023 |
Abstract
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 Schrödinger 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.
Keywords
- helium hydride molecular ion, laser-induced dissociation, strong laser fields, time-dependent Schrödinger equation
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 56, No. 11, 115101, 04.05.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mass-ratio dependent strong-field dissociation of artificial helium hydride isotopologues
AU - Oppermann, F.
AU - Mhatre, S.
AU - Gräfe, S.
AU - Lein, M.
N1 - Funding Information: We are grateful to the Deutsche Forschungsgemeinschaft for supporting this work through the Priority Programme 1840, Quantum Dynamics in Tailored Intense Fields (QUTIF) – project number 281260359.
PY - 2023/5/4
Y1 - 2023/5/4
N2 - 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 Schrödinger 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.
AB - 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 Schrödinger 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.
KW - helium hydride molecular ion
KW - laser-induced dissociation
KW - strong laser fields
KW - time-dependent Schrödinger equation
UR - http://www.scopus.com/inward/record.url?scp=85157965365&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2301.04500
DO - 10.48550/arXiv.2301.04500
M3 - Article
AN - SCOPUS:85157965365
VL - 56
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
IS - 11
M1 - 115101
ER -