University of Illinois Urbana-Champaign

HIGH PRECISION INFRARED SPECTROSCOPY OF OH+

Markus, Charles R.

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321492.pptx
876.pdf

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https://hdl.handle.net/2142/79448

Description

Title
HIGH PRECISION INFRARED SPECTROSCOPY OF OH+
Author(s)
Markus, Charles R.
Contributor(s)
  • McCall, Benjamin J.
  • Jenkins, Paul A., II
  • Kocheril, G. Stephen
  • Hodges, James N.
  • Perry, Adam J.
Issue Date
22-Jun-15
Keyword(s)
Mini-symposium: High-Precision Spectroscopy
Date of Ingest
2016-01-05T20:05:05Z
Abstract
The molecular ion OH$^{+}$ is of significant importance to interstellar chemistry. OH$^{+}$ is a key intermediate in the formation of water, and the ratios of OH$^{+}$ to H$_{2}$O$^{+}$ and H$_{3}$O$^{+}$ have been used to calculate the cosmic ray ionization rates in diffuse molecular clouds.footnote{F. Wyrowski textit{et al., Astron. Astrophys.}, (2010),textbf{26},5.}footnote{E. Gonzﾇlez-Alfonso textit{et al., Astron. Astrophys.,} (2013), textbf{550}, A25.}footnote{N. Indriolo textit{et al., Astrophys. J.}, (2015), textbf{800}, 40.} To improve on previous spectroscopic work, the sensitive technique Noise Immune Cavity Enhanced Optical Heterodyne Velocity Modulation Spectroscopy (NICE-OHVMS) has been used to record rovibrational transitions of OH$^+$. Previously this approach has been used to investigate HCO$^{+}$, H$_{3}^{+}$, CH$_{5}^{+}$, and HeH$^{+}$.footnote{J.N. Hodges textit{et al., Chem. Phys.}, (2013), textbf{139}, 164201.}footnote{A.J. Perry textit{et al., J. Chem. Phys.}, (2014), textbf{141}, 101101.} Using an optical frequency comb for precise frequency calibration, the OH$^+$ line centers have been determined with $sim$MHz uncertainties. Here the most precise and accurate list of rovibrational transitions of OH$^{+}$ is presented. These values can then be used to empirically determine rotational transitions through combination difference analysis.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
English
Permalink
http://hdl.handle.net/2142/79448

Owning Collections

Abstracts & Presentations - 2015 International Symposium on Molecular Spectroscopy PRIMARY