@article {968,
title = {Nuclear hyperfine structure in the X-3 Sigma(+) state of (ZrC)-Zr-91},
journal = {Journal of Molecular Spectroscopy},
volume = {228},
number = {2},
year = {2004},
note = {ISI Document Delivery No.: 869ESTimes Cited: 5Cited Reference Count: 43},
month = {Dec},
pages = {554-564},
type = {Article},
abstract = {{Electronic band systems of zirconium monocarbide, ZrC, in the 16000-19000cm(-1) region have been observed following the reaction of laser-ablated Zr atoms with methane under supersonic free-jet conditions. Rotational analyses of high-resolution spectra have shown that the ground state of ZrC is a (3)Sigma state, with r(0) = 1.8066 Angstrom and an unexpectedly small spin-spin parameter},
keywords = {BAND SYSTEMS, ELECTRONIC-TRANSITIONS, GROUND-STATE, laser spectroscopy, MONOCARBIDE, OPTICAL SPECTROSCOPY, REGION, RHC, ROTATIONAL ANALYSIS, SPECTRUM},
isbn = {0022-2852},
url = {://000224966800026},
author = {Rixon, S. J. and Chowdhury, P. K. and Merer, A. J.}
}
@article {366,
title = {Influence of the 6th and 10th spatial harmonics on the peak shape of a quadrupole mass filter with round rods},
journal = {Rapid Communications in Mass Spectrometry},
volume = {16},
number = {15},
year = {2002},
note = {ISI Document Delivery No.: 578QXTimes Cited: 32Cited Reference Count: 32},
pages = {1425-1431},
type = {Article},
abstract = {The influence of the ratio of the rod radius, r, to field radius, r(0), on the peak shape for a linear quadrupole mass filter constructed with round rods has been investigated. The expansion of the potential in multipoles, phi(N),Phi(x,y)= Sigma(N=0)(infinity)A(N)phi(N)/r(0)(N), has been considered, and the peak shape and resolution have been determined by numerical calculation of ion trajectories in quadrupoles with different ratios, r/r(0). Geometries that make the dodecapole term (A(6)) zero (r/(0) = 1.14511) do not give the best performance because the contribution of the 20-pole term, A(10), must be considered. The optimum ratio is r/r(0) approximate to 1.13. With this ratio the dodecapole term (A(6)) is ca. 1 x 10(-3), but its effects are partially compensated by the A(10) term which has similar magnitude, but opposite sign. Copyright (C) 2002 John Wiley Sons, Ltd.},
keywords = {2ND, ION-TRAP, REGION, SIMULATION},
isbn = {0951-4198},
url = {://000177131400003},
author = {Douglas, D. J. and Konenkov, N. V.}
}
@article {422,
title = {Matrix methods for the calculation of stability diagrams in quadrupole mass spectrometry},
journal = {Journal of the American Society for Mass Spectrometry},
volume = {13},
number = {6},
year = {2002},
note = {ISI Document Delivery No.: 557DZTimes Cited: 24Cited Reference Count: 47},
month = {Jun},
pages = {597-613},
type = {Article},
abstract = {The theory of the computer calculation of the stability of ion motion in periodic quadrupole fields is considered. A matrix approach for the numerical solution of the Hill equation and examples of calculations of stability diagrams are described. The advantage of this method is that it can be used for any periodic waveform. The stability diagrams with periodic rectangular waveform voltages are calculated with this approach. Calculations of the conventional stability diagram of the 3-D ion trap and the first six regions of stability of a mass filter with this method are presented. The stability of the ion motion for the case of a trapping voltage with two or more frequencies is also discussed. It is shown that quadrupole excitation with the rational angular frequency omega = NOmega/P (where N, P are integers and Omega is the angular frequency of the trapping field) leads to splitting of the stability diagram along iso-P lines. Each stable region of the unperturbed diagram splits into P stable bands. The widths of the unstable resonance lines depend on the amplitude of the auxiliary voltage and the frequency. With a low auxiliary frequency splitting of the stability diagram is greater near the boundaries of the unperturbed diagram. It is also shown that amplitude modulation of the trapping RF voltage by an auxiliary signal is equivalent to quadrupole excitation with three frequencies. The effect of modulation by a rational frequency is similar to the case of quadrupole excitation, although splitting of the stability diagram differs to some extent. The methods and results of these calculations will be useful for studies of higher stability regions, resonant excitation, and non-sinusoidal trapping voltages. (J Am Soc Mass Spectrom 2002, 13, 597-613) (C) 2002 American Society for Mass Spectrometry.},
keywords = {CLOUD, EXCITATION, FILTER, FREQUENCY, HIGH-RESOLUTION, ION-TRAP, OPERATION, PARAMETRIC RESONANCES, PAUL TRAP, REGION},
isbn = {1044-0305},
url = {://000175893800003},
author = {Konenkov, N. V. and Sudakov, M. and Douglas, D. J.}
}
@article {4991,
title = {Laser-induced phosphorescence of SO2 in solid neon: Direct observation of the (b)over-tilde(3)A(2) state in the (OSO)-O-16-O-18 molecule},
journal = {Journal of Physical Chemistry A},
volume = {104},
number = {4},
year = {2000},
note = {ISI Document Delivery No.: 280WFTimes Cited: 13Cited Reference Count: 41},
month = {Feb},
pages = {771-776},
type = {Article},
abstract = {Laser excitation of isotopically labeled SO2 molecules in a neon matrix has allowed the measurement of dispersed phosphorescence spectra ((a) over tilde(3)B(1)-(X) over tilde(1)A(1)) in the wavelength region 387.5-526.3 nm (19 000-25 800 cm(-1)). The origin of the (a) over tilde-(X) over tilde transition lies at 25 747 cm(-1) in (OSO)-O-16-O-16, shifted 18 cm(-1) to the red from the gas phase; the three vibrational frequencies of the (X) over tilde state are nearly unperturbed in the neon matrix (1149, 520, and 1362 cm(-1)). As the zero-phonon lines are sharp and well resolved, it has been possible to monitor emission from a specific isotopomer to obtain its excitation spectrum. The excitation spectra of matrix-isolated (OSO)-O-16-O-16 and (OSO)-O-18-O-18 in the region 350.9-388.5 nm (25 740-28 500 cm(-1)) are similar to those previously observed in the gas phase, with strong perturbations affecting all vibrational levels above a(3)B(1)(110) at 27 005 cm(-1) (370 nm). Two additional groups of bands are observed for the unsymmetrical isotopomer (OSO)-O-18-O-16; they are identified as transitions to levels of the (a) over tilde(3)B(1) state with v(3) = 1 and as direct transitions to the (b) over tilde(3)A(2) state, which both become allowed in the lower symmetry. The v(3) frequency of the (a) over tilde(3)B(1) state of (OSO)-O-18-O-16 is 922 cm(-1); for the (b) over tilde(3)A(2) state, v(1) similar or equal to 791 cm(-1) and v(2) similar or equal to 315 cm(-1), while the (b) over tilde (001) level lies 26 653 cm(-1) above the (X) over tilde (000) level.},
keywords = {ABSORPTION, BAND SYSTEM, FLUORESCENCE, INDUCED EMISSION, MATRICES, REGION, ROTATIONAL, SPECTRA, STRUCTURE, SULFUR-DIOXIDE, VIBRATIONAL STRUCTURE},
isbn = {1089-5639},
url = {://000085126200014},
author = {Zen, C. C. and Chen, I. C. and Lee, Y. P. and Merer, A. J.}
}
@article {4618,
title = {Magnetic susceptibility of aqueous tert-butanol},
journal = {Physical Chemistry Chemical Physics},
volume = {1},
number = {1},
year = {1999},
note = {ISI Document Delivery No.: 179VLTimes Cited: 5Cited Reference Count: 27},
month = {Jan},
pages = {133-135},
type = {Article},
abstract = {Magnetic susceptibilities of aqueous tert-butanol were measured by the external double reference NMR method of Momoki and Fukazawa.(1,2) Reflecting a non-ideal volumetric behaviour of this mixture the volume susceptibility data shows a large non-ideal composition dependence. On the other hand, the molar magnetic susceptibility exhibits a small but finite deviation from ideality. Thus, an intra-molecular property, diamagnetic susceptibility, is not completely free from the effect of a non-ideal molecular arrangement in the mixture.},
keywords = {2-BUTOXYETHANOL, 25-DEGREES-C, ALCOHOL-SOLUTIONS, BUTYL ALCOHOL, COMPRESSIBILITIES, EXTERNAL REFERENCING METHOD, MIXTURES, NONELECTROLYTES, PARTIAL MOLAR ENTHALPIES, REGION, WATER-RICH},
isbn = {1463-9076},
url = {://000079350200019},
author = {Mizuno, K. and Ochi, T. and Shimada, S. and Nishimura, Y. and Maeda, S. and Koga,Yoshikata}
}
@article {3517,
title = {A COMPARISON OF LIQUID-VAPOR COEXISTENCE IN CHARGED HARD-SPHERE AND CHARGED HARD DUMBBELL FLUIDS},
journal = {Journal of Chemical Physics},
volume = {103},
number = {18},
year = {1995},
note = {ISI Document Delivery No.: TC854Times Cited: 48Cited Reference Count: 27},
month = {Nov},
pages = {8299-8301},
type = {Note},
abstract = {Simulations are used to show that fluids of charged hard spheres and charged hard dumbbells have similar liquid-vapor coexistence curves. We conclude that the condensation of ionic fluids is largely driven by the interaction of ion pairs. The relevance of this observation to current theories of ionic condensation is discussed. (C) 1995 American Institute of Physics.},
keywords = {CONSOLUTE, CRITICAL EXPONENT, ELECTROLYTES, IONIC FLUIDS, MONTE-CARLO, POINT, REGION, RESTRICTED PRIMITIVE MODEL},
isbn = {0021-9606},
url = {://A1995TC85400065},
author = {Shelley, J. C. and Patey, G. N.}
}