High-resolution THz measurements of BrO generated in an inductively coupled plasma

Nemchick, Deacon J.

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https://hdl.handle.net/2142/97151 Copy

Description

Title

High-resolution THz measurements of BrO generated in an inductively coupled plasma

Author(s)

Nemchick, Deacon J.

Contributor(s)

Drouin, Brian

Issue Date

2017-06-22

Keyword(s)

Radicals

Abstract

Building upon the foundation provided by previous work, the textit{X}$_{1}$$^{2}$$Pi$$_{3/2}$ and textit{X}$_{2}$$^{2}$$Pi$$_{1/2}$ states of the transient radical, BrO, were interrogated in previously unprobed spectral regions (0.5 to 1.7 THz) by employing JPL developed high-resolution cascaded frequency multiplier sources. Like other members of the halogen monoxides (XO), this species has been the target of several recent atmospheric remote sensing studies and is a known participant in a catalytic ozone degradation cycle. For the current work, BrO is generated in an inductively coupled plasma under dynamic flow conditions and rotational lines are observed directly at their Doppler-limited resolution. New spectral transitions including those owing to both the ground ($nu$=0) and excited ($nu$=1 and 2) vibrational states of isotopologues composed of permutations of natural abundance $^{16}$O, $^{18}$O, $^{79}$Br, and $^{81}$Br are fit to a global Hamiltonian containing both fine and hyperfine terms. In addition to further refining existing spectroscopic parameters, new observations will be made available to remote detection communities through addition to the JPL catalog. New findings will be discussed along with future plans to extend these studies to other halogen monoxides (X=Cl and I) and the more massive halogen dioxides (OXO & XOO).

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/97151

DOI

https://doi.org/10.15278/isms.2017.RJ07

Copyright and License Information

Copyright 2017 Deacon J. Nemchick

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