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application/vnd.openxmlformats-officedocument.presentationml.presentation ![]() | Presentation | Microsoft PowerPoint 2007 |
Description
Title: | THE 3d BROMIDE SERIES: THE PURE ROTATIONAL SPECTRUM OF CrBr (X6Σ+) |
Author(s): | Herman, Tyler J |
Contributor(s): | Ziurys, Lucy M. |
Subject(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. |
Issue Date: | 2019-06-19 |
Publisher: | International Symposium on Molecular Spectroscopy |
Genre: | Conference Paper / Presentation |
Type: | Text |
Language: | English |
URI: | http://hdl.handle.net/2142/104394 |
DOI: | 10.15278/isms.2019.WJ08 |
Rights Information: | Copyright 2019 Tyler J Herman |
Date Available in IDEALS: | 2019-07-15 2020-01-25 |