University of Illinois Urbana-Champaign

The 3D bromide series: The pure rotational spectrum of CrBr (X6Σ+)

Herman, Tyler J.

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1452953.pdf
1452953.pptx
3959.pdf

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https://hdl.handle.net/2142/104394

Description

Title
The 3D bromide series: The pure rotational spectrum of CrBr (X6Σ+)
Author(s)
Herman, Tyler J.
Contributor(s)
Ziurys, Lucy M.
Issue Date
2019-06-19
Keyword(s)
Metal containing
Date of Ingest
  • 2019-07-15T22:16:50Z
  • 2020-01-25T19:30:59Z
Abstract
The millimeter-wave spectrum of the high spin radical chromium bromide, CrBr, in its X$^{6}\Sigma^{+}$ state has been measured using direct absorption methods between 220-300 GHz. The radical was created in a DC discharge by the reaction of dibromomethane with chromium vapor, produced in a Broida-type oven. This study is the first measurement of CrBr by any spectroscopic technique. Eight rotational transitions of four isotopologues ($^{52}$Cr$^{79}$Br, $^{52}$Cr$^{81}$Br, $^{53}$Cr$^{79}$Br, and $^{53}$Cr$^{81}$Br) of this radical were recorded in the ground vibrational state, each consisting of fine structure sextets with additional bromine hyperfine splitting. Spectra were also obtained for the v=1 and v=2 states of $^{52}$Cr$^{81}$Br and $^{52}$Cr$^{79}$Br. The data were fit with a Hund’s case b Hamiltonian and rotational, spin-spin, spin-rotation and hyperfine parameters were determined, including the higher order spin terms $\gamma_{s}$ and $\it{\Theta}$. The hyperfine constants indicate that CrBr has a significant covalent component to its bonding, unlike its chlorine and fluorine counterparts.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/104394
DOI
https://doi.org/10.15278/isms.2019.WJ08
Copyright and License Information
Copyright 2019 Tyler J. Herman

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Abstracts & Presentations - 2019 International Symposium on Molecular Spectroscopy PRIMARY