## Details

Originalsprache | Englisch |
---|---|

Aufsatznummer | 115101 |

Fachzeitschrift | Journal of Physics B: Atomic, Molecular and Optical Physics |

Jahrgang | 56 |

Ausgabenummer | 11 |

Publikationsstatus | Veröffentlicht - 4 Mai 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.

## ASJC Scopus Sachgebiete

- Physik und Astronomie (insg.)
**Atom- und Molekularphysik sowie Optik**- Physik und Astronomie (insg.)
**Physik der kondensierten Materie**

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**Mass-ratio dependent strong-field dissociation of artificial helium hydride isotopologues.**/ Oppermann, F.; Mhatre, S.; Gräfe, S. et al.

in: Journal of Physics B: Atomic, Molecular and Optical Physics, Jahrgang 56, Nr. 11, 115101, 04.05.2023.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

*Journal of Physics B: Atomic, Molecular and Optical Physics*, Jg. 56, Nr. 11, 115101. https://doi.org/10.48550/arXiv.2301.04500, https://doi.org/10.1088/1361-6455/accb75

*Journal of Physics B: Atomic, Molecular and Optical Physics*,

*56*(11), Artikel 115101. https://doi.org/10.48550/arXiv.2301.04500, https://doi.org/10.1088/1361-6455/accb75

}

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 -