Mass-independent Dunham analysis of the known electronic states of PtS

Harms, Jack C.

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https://hdl.handle.net/2142/104309 Copy

Description

Title

Mass-independent Dunham analysis of the known electronic states of PtS

Author(s)

Harms, Jack C.

Contributor(s)

• O'Brien, James J.
• O'Brien, Leah C.

Issue Date

2019-06-19

Keyword(s)

Metal containing

Abstract

Several new vibrational bands of the [15.9] \textit{B} $\Omega$=0$^{+}$-\textit{X} $^{3}\Sigma^{-}_{(\Omega=0^{+})}$ and [12.5] $\Omega$=0$^{+}$-\textit{X} $^{3}\Sigma^{-}_{(\Omega=0^{+})}$ transitions of PtS have been recorded at high resolution using Intracavity Laser Spectroscopy (ILS). These new bands have been rotationally analyzed and incorporated into a comprehensive PtS data set that was fit to a mass-independent Dunham expression using PGOPHER. The comprehensive data set included all of the reported spectroscopic data for PtS, including: 32 FTMW transitions (estimated accuracy: 1 kHz) [Cooke and Gerry, \textit{J. Chem. Phys.}, \textbf{121}, 3486 (2004)], 9 MODR transitions (25 kHz) [Li \textit{et al., J. Mol. Spec.}, \textbf{170}, 310 (1995)], 51 mm- and sub-mm transitions (25-50 kHz) [Okabayashi \textit{et al., J. Mol. Spec.}, \textbf{248}, 7 (2012)], 469 MB-LIF transitions (0.003 \wn) [Li \textit{et al.}], and 4651 ILS transitions (0.005 \wn) [Handler \textit{et al., J. Mol. Spec.}, \textbf{263}, 78 (2010) and from this work]. Deviations from the Dunham model were observed due to both the breakdown of the Born-Oppenheimer approximation and field-shift effects resulting from differences in nuclear charge density between Pt-isotopes. The observed field-shift effects extended to isotope-dependent shifts in electronic excitation energy, which have been reported previously only for PbS (and for PtF and PtCl in recent work by our group). The results of the analysis and a discussion of the deviations from the Dunham model will be presented.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/104309

DOI

https://doi.org/10.15278/isms.2019.WJ01

Copyright and License Information

Copyright 2019 Jack C. Harms

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