@article {5050,
	title = {Fourier transform microwave spectroscopy of the (2)Sigma(+) ground states of YbX (X=F, Cl, Br): Characterization of hyperfine effects and determination of the molecular geometries},
	journal = {Journal of Chemical Physics},
	volume = {115},
	number = {15},
	year = {2001},
	note = {ISI Document Delivery No.: 478ZYTimes Cited: 17Cited Reference Count: 34},
	month = {Oct},
	pages = {6979-6989},
	type = {Article},
	abstract = {The pure rotational spectra of low lying v=0 and 1 vibrational levels of the (2)Sigma (+) ground states of several isotopomers of YbF, YbCl, and YbBr were recorded using a pulsed jet cavity Fourier transform microwave spectrometer. Through least squares fits, parameters describing rotational, fine, and hyperfine effects (such as Fermi-contact, dipole-dipole coupling, and nuclear spin-rotation coupling) are presented. Trends in this halide series show an increasing amount of unpaired spin-density on the halide nucleus with increasing halide atomic number, which is consistent with results obtained in previous studies of the calcium analogs. Effective equilibrium bond lengths for (YbF)-Yb-174 and (YbCl)-Yb-174-Cl-35 have been determined to be 2.016 514(1) Angstrom and 2.488 285(1) Angstrom, respectively. The spectra of the two major bromine isotopomers, (YbBr)-Yb-174-Br-79 and (YbBr)-Yb-174-Br-81, were studied only in the v=0 level, and the derived values of r(0) are 2.647 364 5(2) Angstrom and 2.647 347 6(2) Angstrom, respectively. The uncertainties in the equilibrium bond lengths of YbF and YbCl are discussed in terms of the measurement accuracies of the spectra and of the Born-Oppenheimer approximation. (C) 2001 American Institute of Physics.},
	keywords = {BEAM, CONSTANTS, laser spectroscopy, MONOBROMIDE, MONOFLUORIDE, PURE ROTATIONAL SPECTRUM, RF DOUBLE-RESONANCE, SPIN-ROTATION, TRANSITION, X(2)SIGMA(+) STATE},
	isbn = {0021-9606},
	url = {<Go to ISI>://000171380500024},
	author = {Dickinson, C. S. and Coxon, J. A. and Walker, N. R. and Gerry, M. C. L.}
}
@article {4867,
	title = {The pure rotational spectrum of ScBr},
	journal = {Physical Chemistry Chemical Physics},
	volume = {2},
	number = {1},
	year = {2000},
	note = {ISI Document Delivery No.: 267BBTimes Cited: 12Cited Reference Count: 29},
	pages = {43-46},
	type = {Article},
	abstract = {The pure rotational spectra of (ScBr)-Br-7 9 and (ScBr)-Br-8 1 have been measured in two vibrational states (upsilon = 0 and 1) in the 5-24 GHz spectral region, using a cavity pulsed jet Fourier transform microwave spectrometer. The samples were prepared by ablating Sc metal in the presence of Br-2 contained in the Ar backing gas of the jet. The equilibrium internuclear distance r(e) has been determined along with estimates for the harmonic vibration frequency omega(e) and the dissociation energy, D-e. Nuclear quadrupole coupling constants and spin-rotation constants have been determined for both Sc and Br. The ionic character of the ScBr bond is estimated to be similar to 95\%. Magnetic shieldings for both nuclei have been estimated.},
	keywords = {HYPERFINE, MOLECULAR-BEAM, MONOBROMIDE, RF DOUBLE-RESONANCE, SCANDIUM, SPECTROSCOPY, STATE, SYSTEM, YTTRIUM},
	isbn = {1463-9076},
	url = {<Go to ISI>://000084333800006},
	author = {Lin, W. and Evans, C. J. and Gerry, M. C. L.}
}
@article {4427,
	title = {The pure rotational spectrum of yttrium monobromide},
	journal = {Journal of Chemical Physics},
	volume = {109},
	number = {13},
	year = {1998},
	note = {ISI Document Delivery No.: 123YFTimes Cited: 14Cited Reference Count: 51},
	month = {Oct},
	pages = {5439-5445},
	type = {Article},
	abstract = {The pure rotational spectrum of the X (1)Sigma(+) ground electronic state of yttrium monobromide has been measured. This is the first high-resolution spectrum recorded for this molecule. Transitions in the ground and first excited vibrational states have been measured for both the (YBr)-Br-79 and (YBr)-Br-81 isotopomers. Equilibrium rotational parameters have been determined and an equilibrium bond distance has been calculated. Vibrational parameters have been estimated. Hyperfine structure due to the bromine nuclei has been observed and nuclear quadrupole and nuclear spin-rotation constants have been determined. These parameters have been used to investigate the ionic character of the Y-Br bond and comparisons have been made to several alkali and alkaline earth metal bromide species. (C) 1998 American Institute of Physics. [S0021-9606(98)02337-X].},
	keywords = {BAND SYSTEM, LASER-INDUCED FLUORESCENCE, MOLECULAR-BEAM, PUMP PROBE, RF DOUBLE-RESONANCE, SPECTROSCOPY, STARK, STATE, TRANSITION, YCL, YF},
	isbn = {0021-9606},
	url = {<Go to ISI>://000076152700032},
	author = {Walker, K. A. and Gerry, M. C. L.}
}
@article {4146,
	title = {Investigation of the pure rotational spectrum of magnesium monobromide by Fourier transform microwave spectroscopy},
	journal = {Journal of Chemical Physics},
	volume = {107},
	number = {23},
	year = {1997},
	note = {ISI Document Delivery No.: YK982Times Cited: 7Cited Reference Count: 39},
	month = {Dec},
	pages = {9835-9841},
	type = {Article},
	abstract = {The pure rotational spectrum of the free radical MgBr has been measured in its (2) Sigma(+) ground electronic state by Fourier transform microwave spectroscopy. Transitions have been observed for both (MgBr)-Mg-24-Br-79 and (MgBr)-Mg-24-Br-81 in the v = 0 and v = 1 vibrational states. Rotational and centrifugal distortion constants have been determined for each isotopomer in each vibrational state. Equilibrium rotational constants have been calculated and an accurate equilibrium bond length has been determined. Spin-rotation constants, for both the unpaired electron and the bromine nuclei, have been calculated along with magnetic and nuclear quadrupole hyperfine constants for the bromine nuclei. From these constants, the electronic structure of MgBr has been investigated and comparisons have been made to similar compounds. The unpaired electron spin density on the bromine nucleus has been found to be very small, suggesting that this is a very ionic compound. However, the Mg-Br bond has been found to have more covalent character than the bond in other alkaline earth monobromides. (C) 1997 American Institute of Physics. [S0021-9606(97)02046-1].},
	keywords = {BAF, CABR, HYPERFINE-STRUCTURE, MGF, MILLIMETER-WAVE SPECTRUM, MOLECULAR-BEAM, PARAMETERS, radicals, RF DOUBLE-RESONANCE, SPECTROMETER},
	isbn = {0021-9606},
	url = {<Go to ISI>://A1997YK98200014},
	author = {Walker, K. A. and Gerry, M. C. L.}
}
