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  • 1
    Electronic Resource
    Electronic Resource
    Detection of sulfuric acid aerosols by ultraviolet scattering (1985)
    s.l. : American Chemical Society
    Environmental science & technology 19 (1985), S. 815-820 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es00139a008
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of lead on oxidation activity of copper oxide-alumina catalyst (1972)
    s.l. : American Chemical Society
    Environmental science & technology 6 (1972), S. 239-242 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es60062a004
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  • 3
    Electronic Resource
    Electronic Resource
    Plasma pressure and anisotropy inferred from the Tsyganenkomagnetic field model (1994)
    Springer
    Annales geophysicae 12 (1994), S. 286-295 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A numerical procedure has been developed to deduce the plasma pressure and anisotropy from the Tsyganenko magnetic field model. The Tsyganenko empirical field model, which is based on vast satellite field data, provides a realistic description of magnetic field configuration in the magnetosphere. When the force balance under the static condition is assumed, the electromagnetic J×B force from the Tsyganenko field model can be used to infer the plasma pressure and anisotropy distributions consistent with the field model. It is found that the J×B force obtained from the Tsyganenko field model is not curl-free. The curl-free part of the J×B force in an empirical field model can be balanced by the gradient of the isotropic pressure, while the nonzero curl of the J×B force can only be associated with the pressure anisotropy. The plasma pressure and anisotropy in the near-Earth plasma sheet are numerically calculated to obtain a static equilibrium consistent with the Tsyganenko field model both in the noon-midnight meridian and in the equatorial plane. The plasma pressure distribution deduced from the Tsyganenko 1989 field model is highly anisotropic and shows this feature early in the substorm growth phase. The pressure anisotropy parameter 〈alpha〉P, defined as 〈alpha〉P=1-P\VertP⊥, is typically \sim0.3 at x\approx-4.5RE and gradually decreases to a small negative value with an increasing tailward distance. The pressure anisotropy from the Tsyganenko 1989 model accounts for 50% of the cross-tail current at maximum and only in a highly localized region near x\sim-10RE. In comparison, the plasma pressure anisotropy inferred from the Tsyganenko 1987 model is much smaller. We also find that the boundary conditions have significant effects on the plasma pressure distributions and have to be considered carefully.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-994-0286-y
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  • 4
    Electronic Resource
    Electronic Resource
    Reaction rate constants of NO+(a)+NO and Ar++NO measured by an optical detection method (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 7893-7900 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The NO γ emission is observed from the reaction of NO+(a)+NO. The emission provides a new detection method for studying the NO+(a) reaction kinetics at thermal energy without electric field. The NO+(a) is produced by photoionization of NO at 76.5 nm as well as by the reaction of Ar++NO, where Ar+ is also produced by photoionization of Ar. The vibrational population distributions of NO(A) resulted from the ion–molecule reactions are measured and used to discuss the mechanisms for the production of the emission. The reaction rate constants are determined from the decay rates of the emission intensity as a function of time. The reaction rate constants of NO+(a)+NO and Ar++NO at room temperature are measured to be (5.8±0.7)×10−10 and (2.1±1.0)×10−10 cm3/s, respectively. The reaction rate constant of NO+(a)+Ar at thermal energy is estimated to be about 10−12 cm3/s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460124
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  • 5
    Electronic Resource
    Electronic Resource
    Emission spectra of SiF3 (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 2834-2835 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Emission spectra of SiF3 radical were observed from photodissociative excitation of SiF4 at 99.1, 95.5, and 92.3 nm. The spectra show a broad visible band in the 350–800 nm region, a UV band in 290–340 nm, and a weak band in 240–280 nm. The visible band resembles the chemiluminescence spectra observed from etching of silicon by F or XeF2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455935
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  • 6
    Electronic Resource
    Electronic Resource
    CH3O(A˜–X˜) fluorescence from photodissociation of dimethyl ether (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 6555-6557 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photoabsorption and fluorescence cross sections of dimethyl ether, (CH3)2 O, were measured in the 110–195 nm region using synchrotron radiation as a light source. Fluorescence was observed in the 120–155 nm region with a maximum cross section of 5.5×10−19 cm2 at 137 nm. The fluorescence spectra produced at 147 and 157.5 nm were dispersed and identified to be the CH3O (A˜–X˜) transition. The radiative lifetime of CH3O*(A˜) is 1.8±0.3 μs and the quenching rate constant of CH3O(A˜) by dimethyl ether is (5.7±0.4)×10−10 cm3 /s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455378
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  • 7
    Electronic Resource
    Electronic Resource
    Reaction rate constants of HO2+O3 in the temperature range 233–400 K (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 896-899 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The reaction rate constants of HO2+O3 were measured as a function of temperature. HO2 was produced by the reaction sequence: Cl+CH3OH→CH2OH+HCl and CH2OH+O2→HO2+CH2O. HO2 was detected by the OH(A–X) fluorescence produced by photoexcitation of HO2 at 147 nm. The reaction rate constants are represented by k(T)=(1.8±0.6)×10−14 exp[−(680±148)/T] cm3/s in 253–400 K, and are nearly a constant of (1.3±0.3)×10−15 cm3/s in 233–253 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454169
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  • 8
    Electronic Resource
    Electronic Resource
    Quantitative spectroscopy study of HBr in the 105–235 nm region (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 4919-4924 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photoabsorption and fluorescence cross sections of HBr were measured in the 105–235 nm region using synchrotron radiation as a light source. Sharp absorption bands were observed in the 105–120 nm region. These bands were classified into Rydberg series, and their oscillator strengths were measured. Fluorescence in the ultraviolet region was observed and used to identify the V 1∑+ state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451728
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  • 9
    Electronic Resource
    Electronic Resource
    Fluorescence from photoexcitation of CF3X (X=H, Cl, and Br) at 50–106 nm (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 133-139 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photoabsorption and fluorescence cross sections of CF3H, CF3Cl, and CF3Br are measured in the 50–106 nm region using synchrotron radiation. Fluorescence spectra from photoexcitation of these molecules are dispersed to identify the emitting species to be mainly the excited CF@B|2, CF*3, and CF3X+*, but not CF+@B|3. The fluorescence excitation function of CF3X (X=F, H, Cl, or Br) is generally divided into three excitation bands; each band produces a specific excited species. The fluorescence yields of the studied molecules are determined and correlated with dissociation thresholds and ionization potentials. The excited ion states that may emit are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458482
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  • 10
    Electronic Resource
    Electronic Resource
    Rate constant of the gas phase reaction of SO3 with H2O (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 4853-4860 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rate constants for the reaction of SO3 with H2O in He and in N2 were measured at total pressures from 1–10 Torr in a flow tube at room temperature. The concentration of SO3 was monitored by photofragment emission produced by 147 nm excitation. Dependencies of apparent reaction rates on wall conditions and reaction tube sizes were investigated. At total He pressures of 1–10 Torr, a value of (5.7±0.9)×10−15 cm3 /s was obtained for the upper limit of the homogeneous gas phase reaction rate constant. This rate value is more than two orders of magnitude lower than the previously published value, but it is consistent with the theoretical calculation provided in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455680
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