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Double resonance rotational spectroscopy of He–HCO+

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Abstract

The ground state of He–HCO+ is investigated using a recently developed double resonance technique, consisting of a rotational transition followed by a vibrational transition into a dissociative state. In order to derive precise predictions for the rotational states, the high resolution infrared predissociation spectroscopy of the v1 C–H stretching mode is revisited. Eleven pure rotational transitions are measured via the double resonance method. A least squares fit of these transitions to a standard linear rotor Hamiltonian reveals that the semirigid rotor model cannot fully describe the loosely bound He–HCO+ complex. The novel double resonance technique is compared with other action spectroscopic schemes, and some potential future applications are presented.

Graphical abstract: Double resonance rotational spectroscopy of He–HCO+

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Publication details

The article was received on 17 Jul 2018, accepted on 21 Aug 2018 and first published on 23 Aug 2018


Article type: Paper
DOI: 10.1039/C8CP04532A
Citation: Phys. Chem. Chem. Phys., 2019, Advance Article
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    Double resonance rotational spectroscopy of He–HCO+

    T. Salomon, M. Töpfer, P. Schreier, S. Schlemmer, H. Kohguchi, L. Surin and O. Asvany, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C8CP04532A

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