@article {2482, title = {Fourier transform microwave spectrum of and Born-Oppenheimer breakdown effects in tungsten monoxide, WO}, journal = {Canadian Journal of Physics}, volume = {87}, number = {5}, year = {2009}, note = {ISI Document Delivery No.: 494RVTimes Cited: 0Cited Reference Count: 33Krumrey, Christine Cooke, Stephen A. Russell, Douglas K. Gerry, Michael C. L.}, month = {May}, pages = {567-573}, type = {Article}, abstract = {Rotational transitions of eight isotopomers of tungsten monoxide, WO, in its X0(+) ground electronic state, have been measured in the frequency range 22-26 GHz, using a cavity Fourier transform microwave spectrometer. The samples were prepared by laser ablation of W metal in the presence of O-2 and stabilized in pulsed supersonic jets of Ne or Ar. Only the J = 1-0 transition was accessible within the frequency range of the spectrometer. It was measured for the ground (nu = 0) and two excited (nu = 1, 2) vibrational states. Hyperfine structure due to W-183 nuclear spin-rotation coupling was found for (WO)-W-183. The overall spectral fit used a Dunham-type expression including Born-Oppenheimer breakdown parameters. Only the nu = 0 and 1 states could be fit to the measurement accuracy because of a small perturbation of the nu = 2 state. It was necessary to account for the finite nuclear size of the W nucleus in the fit. The resulting parameter V-01(W) agreed well with a value calculated using density functional theory. Equilibrium internuclear distances re have been evaluated.}, keywords = {COUPLING CASE C, DIATOMIC-MOLECULES, DUNHAM COEFFICIENTS, ENERGY, FIELD SHIFT, INFRARED-SPECTRA, ISOTOPE DEPENDENCE, PB-CHALCOGENIDES, ROTATIONAL SPECTRUM, TL-HALIDES}, isbn = {0008-4204}, url = {://000269834000014}, author = {Krumrey, C. and Cooke, S. A. and Russell, D. K. and Gerry, M. C. L.} } @article {1088, title = {The influence of nuclear volume and electronic structure on the rotational energy of platinum monoxide, PtO}, journal = {Physical Chemistry Chemical Physics}, volume = {7}, number = {12}, year = {2005}, note = {ISI Document Delivery No.: 942UOTimes Cited: 11Cited Reference Count: 56}, month = {Jun}, pages = {2453-2459}, type = {Article}, abstract = {The pure rotational spectra of seven isotopic species of platinum monoxide have been measured with a cavity pulsed jet Fourier-transform microwave spectrometer. The molecules were prepared by laser ablation of Pt foil in the presence of O-2 and stabilized in a supersonic jet of argon. A multi-isotopomer Dunham-type analysis of the spectra produced values for Y-01 and Y-11, along with unusually large values for Born-Oppenheimer breakdown (BOB) parameters for both Pt and O atoms. The values of the BOB parameters have been rationalized in terms of the molecular electronic structure and finite nuclear size (field shift) effects. A large negative Pt-195 effective nuclear spin-rotation constant has been rationalized in terms of the electron-nucleus dipole dipole hyperfine constant. Precise internuclear separations have been evaluated.}, keywords = {COUPLING CASE C, DIATOMIC-MOLECULES, DIPOLE MOMENT, DUNHAM COEFFICIENTS, EMISSION-SPECTRUM, FIELD SHIFT, FOURIER-TRANSFORM SPECTROSCOPY, GROUND-STATE, HYPERFINE CONSTANTS, PB-CHALCOGENIDES}, isbn = {1463-9076}, url = {://000230308600007}, author = {Cooke, S. A. and Gerry, M. C. L.} }