ELUCIDATING THE COMPLEX LINESHAPES RESULTING FROM THE HIGHLY SENSITIVE, ION SELECTIVE, TECHNIQUE NICE-OHVMS

Hodges, James N.

Permalink

https://hdl.handle.net/2142/79153 Copy

Description

Title

ELUCIDATING THE COMPLEX LINESHAPES RESULTING FROM THE HIGHLY SENSITIVE, ION SELECTIVE, TECHNIQUE NICE-OHVMS

Author(s)

Hodges, James N.

Contributor(s)

• McCall, Benjamin J.
• Siller, Brian

Issue Date

26-Jun-15

Keyword(s)

Spectroscopy as an analytical tool

Abstract

The technique Noise Immune Cavity Enhanced Optical Heterodyne Velocity Modulation Spectroscopy, or NICE-OHVMS, has been used to great effect to precisely and accurately measure a variety of molecular ion transitions from species such as H$_3^+$, CH$_5^+$, HeH$^+$, and HCO$^+$, achieving MHz or in some cases sub-MHz uncertainty.footnote{J.~N. Hodges, textit{et al.} emph{J. Chem. Phys.} (2013), textbf{139}, 164201.}footnote{A.~J. Perry, textit{et al.} emph{J. Chem. Phys.} (2014), textbf{141}, 101101.} It is a powerful technique, but a complete theoretical understanding of the complex NICE-OHVMS lineshape is needed to fully unlock its potential. vspace{1em} NICE-OHVMS is the direct result of the combination of the highly sensitive spectroscopic technique Noise Immune Cavity Enhanced Optical Heterodyne Molecular Spectroscopy(NICE-OHMS) with Velocity Modulation Spectroscopy(VMS), applying the most sensitive optical detection method with ion species selectivity.footnote{K.~N. Crabtree, textit{et al.} emph{Chem. Phys. Lett.} (2012), textbf{551}, 1-6.} The theoretical underpinnings of NICE-OHMS lineshapes are well established,footnote{F.~M. Schmidt, textit{et al.} emph{J. Opt. Soc. Amer. A} (2008), textbf{24}, 1392--1405.} as are those of VMS.footnote{J.~W. Farley, emph{J. Chem. Phys.} (1991), textbf{95}, 5590--5602.} This presentation is the logical extension of those two preceding bodies of work. Simulations of NICE-OHVMS lineshapes under a variety of conditions and fits of experimental data to the model are presented. The significance and accuracy of the various inferred parameters, along with the prospect of using them to extract additional information from observed transitions, are discussed.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/79153

Owning Collections