The Rotational Spectrum, Nuclear Field Shift Effects, 195Pt Nuclear Spin-Rotation Constant, and Electric Dipole Moment of PtSi

Published

February 1, 2004

Author(s)

S A. Cooke, M C. Gerry, D J. Brugh, R D. Suenram

Abstract

The pure rotational spectrum of the X¹Σ⁺ ground electronic state for 9 isotopomers of platimum monosilicide has been measured. For the most abundant isotopomer, ¹⁹⁴pt²⁸Si, the J=1-0 and the J=2-1 transitions were recorded up to the fourth vibrationally excited state. The data set obtained enabled a multi-isotopomer fit to a Dunham-type expression and the constants Y₀₁, Y₀₂, Y₁₁, Y₂₁ and Y₃₁ were determined. In the process of fitting the data it was necessary to include Born-Oppenheimer breakdown correction terms and the values and significance of these terms are discussed. The nuclear spin-rotation constant, C_I(195^Pt) is found to be 30.98(157) kHz in the ground vibrational state. Hyperfine structure arising from the 29Si nucleus was not observed. The measurement of Stark shifts in the rotational spectrum of PtSi has enabled the determination of the dipole moments for the ¹⁹⁴Pt²⁸Si and ¹⁹⁶Pt²⁸Si isotopomers.

Citation

Journal of Molecular Spectroscopy

Volume

223

Issue

No. 2

Pub Type

Journals

Keywords

electric dipole moment, fourier-transform microwave spectrum, laser vaporization, microwave spectrum, platinum monosilicide

Citation

Cooke, S. , Gerry, M. , Brugh, D. and Suenram, R. (2004), The Rotational Spectrum, Nuclear Field Shift Effects, ¹⁹⁵Pt Nuclear Spin-Rotation Constant, and Electric Dipole Moment of PtSi, Journal of Molecular Spectroscopy (Accessed July 27, 2024)