Rovibrational spectroscopy of the CH$^+$-He and CH$^+$-He$_4$ complexes

Thomas Salomon; José L. Doménech; Philipp C. Schmid; Ernest A. Michael; Stephan Schlemmer; Oskar Asvany

doi:10.1016/j.jms.2021.111421

Rovibrational spectroscopy of the CH$^+$-He and CH$^+$-He$_4$ complexes

Chemical Physics 2021-04-07 v1 Astrophysics of Galaxies

Authors: Thomas Salomon , José L. Doménech , Philipp C. Schmid , Ernest A. Michael , Stephan Schlemmer , Oskar Asvany

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Abstract

A cryogenic 22-pole ion trap apparatus is used in combination with a table-top pulsed IR source to probe weakly bound CH $^+$ -He and CH $^+$ -He $_4$ complexes by predissociation spectroscopy at 4 K. The infrared photodissociation spectra of the C-H stretching vibrations are recorded in the range of 2720-2800 cm $^{-1}$ . The spectrum of CH $^+$ -He exhibits perpendicular transitions of a near prolate top with a band origin at 2745.9 cm $^{-1}$ , and thus confirms it to have a T-shaped structure. For CH $^+$ -He $_4$ , the C-H stretch along the symmetry axis of this oblate top results in parallel transitions.

Keywords

rovibrational spectroscopy ch+-he complex ch+-he4 complex predissociation spectroscopy ion trap t-shaped structure

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@article{arxiv.2103.00957,
  title  = {Rovibrational spectroscopy of the CH$^+$-He and CH$^+$-He$_4$ complexes},
  author = {Thomas Salomon and José L. Doménech and Philipp C. Schmid and Ernest A. Michael and Stephan Schlemmer and Oskar Asvany},
  journal= {arXiv preprint arXiv:2103.00957},
  year   = {2021}
}

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6 pages, 2 Tables, 5 Figures Accepted for publication in the Journal of Molecular Spectroscopy 14 January 2021

Rovibrational spectroscopy of the CH$^+$-He and CH$^+$-He$_4$ complexes

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