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Rotational Coherence Spectroscopy of Molecules in Helium Nanodroplets: Reconciling the Time and the Frequency Domains.
Chatterley, Adam S; Christiansen, Lars; Schouder, Constant A; Jørgensen, Anders V; Shepperson, Benjamin; Cherepanov, Igor N; Bighin, Giacomo; Zillich, Robert E; Lemeshko, Mikhail; Stapelfeldt, Henrik.
Afiliação
  • Chatterley AS; Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
  • Christiansen L; Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
  • Schouder CA; Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
  • Jørgensen AV; Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
  • Shepperson B; Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
  • Cherepanov IN; Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria.
  • Bighin G; Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria.
  • Zillich RE; Institute for Theoretical Physics, Johannes Kepler Universität Linz, Altenbergerstraße 69, A-4040 Linz, Austria.
  • Lemeshko M; Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria.
  • Stapelfeldt H; Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
Phys Rev Lett ; 125(1): 013001, 2020 Jul 03.
Article em En | MEDLINE | ID: mdl-32678640
Alignment of OCS, CS_{2}, and I_{2} molecules embedded in helium nanodroplets is measured as a function of time following rotational excitation by a nonresonant, comparatively weak ps laser pulse. The distinct peaks in the power spectra, obtained by Fourier analysis, are used to determine the rotational, B, and centrifugal distortion, D, constants. For OCS, B and D match the values known from IR spectroscopy. For CS_{2} and I_{2}, they are the first experimental results reported. The alignment dynamics calculated from the gas-phase rotational Schrödinger equation, using the experimental in-droplet B and D values, agree in detail with the measurement for all three molecules. The rotational spectroscopy technique for molecules in helium droplets introduced here should apply to a range of molecules and complexes.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article