University of Illinois Urbana-Champaign

IR SPECTRA OF COLD PROTONATED METHANE

Schlemmer, Stephan

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360394.pdf
982.pdf

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https://hdl.handle.net/2142/79101

Description

Title
IR SPECTRA OF COLD PROTONATED METHANE
Author(s)
Schlemmer, Stephan
Contributor(s)
  • Potapov, Alexey
  • Brünken, Sandra
  • Yamada, Koichi M.T.
  • Asvany, Oskar
Issue Date
25-Jun-15
Keyword(s)
Cold/Ultracold/Matrices/Droplets
Date of Ingest
2016-01-05T20:03:53Z
Abstract
High-resolution infrared spectra of mass selected protonated methane, chem{CH_5^+}, have been recorded in the C-H stretching region in a 22-pole ion trap experiment at low temperatures. The frequencies of the infrared OPO system (pump and signal) have been calibrated using a NIR frequency comb. As a result the ro-vibrational IR transition frequencies of chem{CH_5^+} could be determined to an accuracy in the MHz regime.footnote{O. Asvany, J. Krieg, and S. Schlemmer, Frequency comb assisted mid-infrared spectroscopy of cold molecular ions, Review of Scientific Instruments, 83 (2012), 076102.} In this contribution we discuss different techniques of laser induced reactions which enabled recording spectra at different temperatures.footnote{O. Asvany, S. Brﾟnken, L. Kluge, and S. Schlemmer, COLTRAP: a 22-pole ion trapping machine for spectroscopy at 4 K, Applied Physics B: Lasers and Optics, 114 (2014), 203-211} The spectra simplify dramatically at a nominal trap temperature of 4~K. Nevertheless an assignment of these spectra is very difficult. We apply the idea of the Rydberg-Ritz combination principle to the complex spectra of protonated methane in order to get first hints at the energy level structure of this enigmatic molecule.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
English
Permalink
http://hdl.handle.net/2142/79101

Owning Collections

Abstracts & Presentations - 2015 International Symposium on Molecular Spectroscopy PRIMARY