Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 12: High Resolution Spectroscopy and Precision Experiments
MO 12.5: Vortrag
Mittwoch, 13. März 2019, 11:30–11:45, S HS 002 Biologie
Nuclear-quadrupole coupling effects in laser alignment of asymmetric top molecules — •Linda V. Thesing1,2,3, Andrei Duchko1,3, Andrey Yachmenev1,2, Rosario González-Férez4, and Jochen Küpper1,2,3,5 — 1Center for Free-Electron Laser Science, DESY, Hamburg, Germany — 2Center for Ultrafast Imaging, Universität Hamburg, Germany — 3Department of Physics, Universität Hamburg, Germany — 4Instituto Carlos I and Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, Spain — 5Department of Chemistry, Universität Hamburg, Germany
We present a theoretical time-dependent study of the field-free alignment of asymmetric top molecules taking into account the hyperfine coupling due to nuclear-quadrupole interactions. It was recently shown that the nuclear-quadrupole coupling influences the impulsive alignment of linear I2 molecules on an experimentally relevant timescale [1]. Here, we analyze the field-free alignment dynamics, induced by a truncated laser pulse, for the prototypical iodobenzene and diiodobenzene molecules, unraveling the effects of the nuclear-quadrupole coupling. These theoretical studies illustrate how the coupling strength, the number of strongly coupled nuclei and rotational constants affect the alignment revival structure obtained for the different molecules.
Thomas et al., Phys. Rev. Lett. 120, 163202 (2018)