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

Herman, Tyler J.

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

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

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

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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