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Title:MASS-INDEPENDENT DUNHAM ANALYSIS OF NEW ELECTRONIC TRANSITIONS OF PtX (X=F, Cl) OBSERVED USING INTRACAVITY LASER SPECTROSCOPY
Author(s):Harms, Jack C
Contributor(s):O'Brien, James J; O'Brien, Leah C
Subject(s):Metal containing
Abstract:Several vibrational bands of new electronic transitions of PtF and PtCl have been recorded in absorption using Intracavity Laser Spectroscopy (ILS). The PtX molecules were produced in current-regulated RF plasma discharges, operating with 0.30-0.80 A applied to a Pt-lined Cu hollow cathode in approximately 1 Torr of an Ar/He sputter gas mixture. A trace amount of \chem{SF_6} was used as the fluoride source for PtF, and a trace amount of \chem{CCl_4} was used as the chloride source for PtCl. The hollow cathode was located within the resonator cavity of either a DCM dye laser (14,500-16,500 \wn) or Ti:Sapphire laser (12,890-12,990 \wn; 13,255-13,365 \wn), and effective pathlengths of 0.4-2.0 km were utilized with the ILS method. Six vibrational bands were identified for PtF and eight vibrational bands were identified for PtCl. These band systems were assigned to the [15.8+x] $\Omega$=5/2-\textit{B} $^{2}\Delta_{5/2}$ transition of PtF and the [13.8] $\Omega$=3/2-\textit{X} $^{2}\Pi_{3/2}$ transition of PtCl. Both electronic transitions were fit to a mass-independent Dunham type Hamiltonian using PGOPHER. Isotope dependent deviations from the Dunham model were observed due to both Born-Oppenheimer breakdown and field-shift effects resulting from differences in nuclear charge density between Pt-isotopes. The results of the analyses will be presented.
Issue Date:2019-06-19
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/104307
DOI:10.15278/isms.2019.WJ02
Rights Information:Copyright 2019 Jack C Harms
Date Available in IDEALS:2019-07-15
2020-01-25


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