Related papers: Excited rotational states of molecules in a superfluid

Excited rotational states of molecules in a superfluid

URL: http://arxiv.org/abs/2107.00468v1
Date: Wed, 30 Jun 2021 15:59:18 GMT
Title: Excited rotational states of molecules in a superfluid
Authors: Igor N. Cherepanov, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley, Simon H. Albrechtsen, Alberto Vi\~nas Mu\~noz, Lars Christiansen, Henrik Stapelfeldt, Mikhail Lemeshko
Abstract summary: We explore excited rotational states of molecules embedded in helium nanodroplets. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS$_2$ and I$_2$ as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity -- the angular momentum, transferred from the molecule to the droplet.

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