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  • 1
    Electronic Resource
    Electronic Resource
    Kinetic study of the equilibrium HO2 + NO .dblarw. OH + NO2 and the thermochemistry of HO2 (1980)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 102 (1980), S. 6937-6941 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00543a006
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of the HO2+NO reaction rate constant on one-dimensional model calculations of stratospheric ozone perturbations (1978)
    Springer
    Pure and applied geophysics 116 (1978), S. 497-510 
    Details
    ISSN: 1420-9136
    Keywords: 1-D model ; Ozone perturbation ; Photochemistry ; Sensitivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract With the aid of a one-dimensional steady-state, stratospheric model we have calculated ozone changes coused by atmosphric injections of NOx, N2O and chlorofluoromethanes. Adopting the fast rate constant, for the reaction HO2+NO»OH+NO2 measured by Howard and Evenson, we calculate much smaller perturbations of the ozone layer by NOx and N2O additions than previously estimated, but about two times larger ozone reductions as a result of continued emissions of chlorofluoromethanes, CF2Cl2 and CFCl3. The model results are sensitive to adopted values for the rate coefficients for the reactions HO2+O3»OH+2O2 and OH+HO2»H2O+O2 and the eddy diffusion profile near the tropopause. More accurate assessments of ozone perturbations require the development of photochemical models that incorporate meteorological processes in more than one dimension.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01636903
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  • 3
    Electronic Resource
    Electronic Resource
    Gas phase kinetics of the reactions of NaO with H2, D2, H2O, and D2O (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 921-925 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The gas phase reactions of the NaO radical with H2, D2, H2O, and D2O were studied in a flow tube reactor at room temperature. The reaction of NaO with H2 has two exothermic product channels, NaOH+H and Na+H2O. Both channels were observed and the Na formation channel produces some Na in the 32P state. The rate constants for the abstraction channel for H2 and D2 reactants are (2.6±1.0)×10−11 and (1.1×0.4)×10−11 cm3 molecule−1 s−1 at 296±2 K. The reaction of NaO with H2O was shown to be second order and the products are assumed to be NaOH and OH. The rate constants for H2O and D2O reactants are (2.2±0.4)×10−10 and (1.2±0.2)×10−10 cm3 molecule−1 s−1 at 298±1 K. The measured NaO+H2O rate constant is compared to the predicted collision rate constant from a model based on the large attractive dipole–dipole force between NaO and H2O. The role of these reactions in mesospheric Na chemistry is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453726
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  • 4
    Electronic Resource
    Electronic Resource
    Laboratory studies of gas phase sodium diffusion (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 3469-3475 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The gas phase diffusion coefficients of Na in Ne, N2, and CO2 were measured in a flow tube with an oven source and resonant fluoresence detection of Na. DNa,Ne=209±21 cm2 Torr s−1 at 281 K, DNa,N2=129±13 cm2 Torr s−1 at 281 K, and DNa,CO2=134±13 cm2 Torr s−1 at 281 K. DNa,He was measured over the temperature range 211– 424 K. DNa,He(T)=(385±40) (T/300)(1.72±0.18) cm2 Torr s−1. The experimental results are compared with previous studies. The sticking coefficient for Na on the walls of the flow tube was determined to be approximately equal to 1 by an analysis of the diffusion coefficient data. The results for DNa,He, DNa,Ne, and DNa,Ar are compared with the predictions of Chapman–Enskog calculations using Na–noble gas potentials from recent spectroscopic measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450970
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  • 5
    Electronic Resource
    Electronic Resource
    Fourier transform spectroscopy of the ν3 band of the N3 radical (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 1762-1767 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have analyzed the ν3 antisymmetric stretching fundamental of the N3 radical. Azide radicals N3 were generated in a multipass cell by the reaction of Cl atoms and HN3 and detected in absorption using a Fourier transform spectrometer. Improved constants for the 000 vibrational level of X˜ 2Πg are reported along with observations of the 001 level. The frequency of the ν3 fundamental at 1645 cm−1 was found to be somewhat lower than expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455122
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  • 6
    Electronic Resource
    Electronic Resource
    Kinetic study of the reaction of HO2 with ozone (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 2122-2128 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The reaction HO2+O3→OH+2O2 has been studied using a discharge-flow system with laser magnetic resonance detection. The rate constant for the reaction was determined directly by monitoring the first-order decay of isotopically labeled H18O2 in excess 16O3. The data give a curved Arrhenius plot over the temperature range 243〈T〈413 K: k(T)=(3.8±2.4) ×10−14 exp[−(820±190/T)] cm3 s−1. A more representative fit is obtained with a three parameter expression: k(T)=(3.2±5.8)×10−13 exp[−(1730±740)/T] + (1.2±0.5)×10−15 cm3 s1. The error limits are the 95% confidence limits on the coefficients while the accuracy of the measurements is estimated to be about ±20% at each temperature. An analysis of the OH radical product indicates that 16OH is formed predominately (75±10)%. The scrambling reactions H18O2+16O3→H16O2+18O18O16O (1c) and H18O2+16O2→H16O2+18O2 (8) were also examined and found to be slow. Their rate constants are k1c〈2×10−17 cm3 s−1 at 297 and 333 K and k8〈3×10−17 cm3 s−1 at 297 and 413 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453136
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  • 7
    Electronic Resource
    Electronic Resource
    Gas phase kinetics of the reactions of Na and NaO with O3 and N2O (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 5584-5592 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A fast flow reactor, with an oven source and resonant fluorescence detection, was used to study the kinetics of Na atoms in the gas phase. The rate constant for Na+O3 is (7.3±1.4)×10−10 cm3 molecule−1 s−1 at 286 K and NaO+O2 is the predominant product channel. The rate constant for Na+N2O over the temperature range 240 to 429 K is (3.7±0.9)×10−10 exp[(−1690±180)/T] cm3 molecule−1 s−1. The kinetics of the NaO radical were measured directly. NaO is made in the flow tube by the reaction Na+N2O → NaO+N2 with N2O in large excess. NaO is detected by conversion to Na atoms in the detection region by NaO+NO → Na+NO2. NaO+O3 has two exothermic product channels, Na+2O2 and NaO2+O2. The rate constants are ∼5×10−11 and (1.8±0.4)×10−10 cm3 molecule−1 s−1 at 296 K, respectively. Upper limits for NaO+N2O →Na+N2+O2 and NaO+N2O → NaO2+N2 are 1×10−16 and 2×10−15 cm3 molecule−1 s−1, respectively. The rate constant for NaO+NO → Na+NO2 is ∼1.5×10−10 cm3 molecule−1 s−1. Since wall collisions remove NaO with near unit efficiency, NaO diffusion coefficients can be measured. DNaO,He =640±340 cm2 Torr s−1 and DNaO,N2O =48±24 cm2 Torr s−1 at 295 K. The error limits in all cases represent the 95% confidence level, including an estimate of systematic errors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451573
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  • 8
    Electronic Resource
    Electronic Resource
    Room-temperature rate constant for the hydroperoxo + hydroperoxo reaction at low pressures (1984)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 88 (1984), S. 2110-2116 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150654a033
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  • 9
    Electronic Resource
    Electronic Resource
    Kinetics of the Reactions of CF3O Radicals with CO and H2O (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 6000-6009 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100016a041
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  • 10
    Electronic Resource
    Electronic Resource
    Temperature Dependence of the Gas Phase Reactions of CF3O with CH4 and NO (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 8574-8579 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100085a042
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