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  • 1
    Electronic Resource
    Electronic Resource
    Detection of trace species in hostile environments using degenerate four-wave mixing: methylidyne radical (CH) in an atmospheric-pressure flame (1992)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 114 (1992), S. 9122-9130 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00049a053
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  • 2
    Electronic Resource
    Electronic Resource
    Multiphoton studies of jet-cooled Xe2 near the Xe*5d[5/2]03 state: Characterization of the ground and excited state potential curves (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 6129-6136 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The two-photon resonant, three-photon (2+1) ionization spectra of jet-cooled mXenXe, at energies near the Xe* 5d[5/2]03 state, are reported. A new progression has been observed and is attributed to transitions from the van der Waals ground state, X 1Σ+g(0+g), through bound vibrational levels of an excited state of gerade symmetry. The analysis of some 26 closely spaced vibronic bands and isotope effects provides information on the excited and ground state potential energy curves. The vibrational quantum number of the lowest frequency band near 82 539.1 cm−1 is assigned to v'=6±1. For v'=6 this leads to molecular constants Te' (approximately-equal-to) 82 514.9 cm−1, ωe' (approximately-equal-to) 5.7955 cm−1, and ωexe' (approximately-equal-to) 0.07491 cm−1. The upper state can be described by a Morse potential with dissociation energy De' (approximately-equal-to) 112.10 ± 0.05 cm−1 and internuclear separation Re' (approximately-equal-to) 5.51 ± 0.03 A(ring). This is consistent with assignment to a Rydberg molecular state of either the B 2Π1/2g or D 2Σ+1/2g ion core. At the Xe 1S0+Xe* 5d[5/2]03 threshold the molecular spectrum terminates and continuum absorption is evidenced by a rise and fall in the fragment ion yield. The direct determination of the dissociation limit for the excited state is used to derive the ground state dissociation energy De‘(approximately-equal-to) 196.32 ± 0.05 cm−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467077
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  • 3
    Electronic Resource
    Electronic Resource
    Two-photon spectroscopy, Rydberg∼valence interactions, and superexcited state dissociation of HCl probed by resonance enhanced multiphoton ionization (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 5857-5877 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The 1Σ+(0+) and 3Σ−(0+) Rydberg states as well as the V 1Σ+(0+) valence state of hydrogen chloride isotopomers are studied using (2+1) resonance enhanced multiphoton ionization (REMPI) and time-of-flight mass spectrometry (TOFMS). Pulsed supersonic expansion provides sufficient rotational cooling to facilitate rotational analysis. Polarization selection in conjunction with fragment and isotope discrimination provide the first unambiguous identification of all vibrational bands from v'=3 to 32 of the V 1Σ+(0+) state. REMPI excitation spectra from the v‘=0 level of the X 1Σ+(0+) state through vibrational levels of the broad V 1Σ+(0+) state suggest non-Franck–Condon transitions. Perturbations in intensity, line position, and rotational constants are consistent with the near-adiabatic nature of the short-range E 1Σ+(0+) Rydberg state and long-range V 1Σ+(0+)state. Evidence for Rydberg∼valence interaction and repulsive superexcited states is provided by the detection of strong H+ and Cl+ ion yields. The onset of a distinct Cl+ channel is detected for the first time and confirms the presence of at least two dissociation pathways at the three-photon energy and at large internuclear distance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462683
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  • 4
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    TERRY JONES & ALAN EREIRA, "CRUSADES" (Book Review) (1995)
    Nottingham : Periodicals Archive Online (PAO)
    Nottingham medieval studies. 39 (1995) 200 
    Details
    ISSN: 0078-2122
    Topics: History
    Notes: REVIEW-ARTICLES
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4241-1995-039-00-000015
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical Kinetics Database and Predictive Schemes for Humid Air Plasma Chemistry. Part I: Positive Ion–Molecule Reactions (2000)
    Springer
    Plasma chemistry and plasma processing 20 (2000), S. 235-258 
    Details
    ISSN: 1572-8986
    Keywords: plasma ; discharge ; electron beam ; database ; ion molecule ; kinetic ; thermodynamic ; rate constant ; humid air
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Reliable kinetic and thermodynamic data are required to model the evolution of electric discharge or electron-beam decomposition chemistry of gases in humid air streams. In this first segment of a continuing series, we provide a core database describing the initially dominant ion-neutral molecule reactions in humid air plasmas. Recommended reaction rate data and extrapolation tools are presented in a manner to facilitate prediction of reactivities and reaction channels as a function of temperature, pressure, and applied electric field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007021207704
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  • 6
    Electronic Resource
    Electronic Resource
    Time-resolved vibrational chemiluminescence: Rate constants for the reactions of F atoms with H2O and HCN, and for the relaxation of HF (v = 1) by H2O and HCN (1986)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 18 (1986), S. 885-898 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Rate constants have been determined at (298 ± 4) K for the reactions: and the relaxation processes: Time-resolved HF(1,0) emission was observed following the photolysis of F2 with pulses from an excimer laser operating on XeCl (λ = 308 nm). Analysis of the emission traces gave first-order constants for reaction and relaxation, and their dependence on [H2O] and [HCN] yielded: \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{1{\rm a}} = (1.3 \pm 0.1) \times 10^{ - 11} {\rm cm}^{\rm 3} {\rm molecule}^{{\rm - 1}} s^{ - 1} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{1{\rm b}} = (1.3 \pm 0.1) \times 10^{ - 10} {\rm cm}^{\rm 3} {\rm molecule}^{{\rm - 1}} s^{ - 1} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{2{\rm a}} = (3.7 \pm 0.4) \times 10^{ - 13} {\rm cm}^{\rm 3} {\rm molecule}^{{\rm - 1}} s^{ - 1} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{2{\rm b}} = (3.4 \pm 0.2) \times 10^{ - 12} {\rm cm}^{\rm 3} {\rm molecule}^{{\rm - 1}} s^{ - 1} $$\end{document}
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550180808
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