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  • 1
    Digitale Medien
    Digitale Medien
    Quenching of NF singlet states in a hybrid chemical-laser system (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 4051-4058 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Quenching of NF (a1Δ) and NF (b1Σ) was studied in a subscale upconversion gain medium that was based on energy transfer from NF (b1Σ) to IF. Quenching of NF (b1Σ) by IF was found to occur at gas-kinetic rates that were large compared to the energy-transfer rate, indicating low efficiency for the laser. Significant quenching of NF (a1Δ) by IF was also found to occur at a slower rate than was evident for the NF (b1Σ) state.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.337535
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  • 2
    Digitale Medien
    Digitale Medien
    Cs+-electron recombination in the presence of N2, O2, and CO2 at 300 K (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 2795-2802 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The mechanism and rate constants associated with three-body recombination of Cs+ and electrons have been determined by monitoring the disappearance of electrons using a movable double Langmuir probe in a flowtube apparatus. The ambipolar diffusion rate constant for the dilute plasma in argon and helium was measured to be 380±30 cm2 s−1 and 650±200 cm2 s−1, respectively. Electron-ion recombination was measured in the presence of molecular nitrogen, oxygen, and carbon dioxide. From the kinetics of the electron disappearance along the flowtube, plasma recombination in nitrogen can be explained by the formation of a complex ion, recombination in oxygen proceeds through the formation of the O−2 followed by dissociative attachment in which the latter step is the rate determining step, and recombination in CO2 can be attributed to a direct three-body process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.337869
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  • 3
    Digitale Medien
    Digitale Medien
    Quenching of I*(5 2P1/2) by halogen fluorides (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 6687-6693 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Absolute rate constants of the collisional decay of I(5 2P1/2) by the halogen fluorides F2, ClF, and IF have been determined using the technique of time-resolved, laser-initiated infrared fluorescence, as well as atomic absorption spectroscopy (in the case of IF only). The room temperature rate constants, kF2〈8.7×10−14, kCIF=1.3±0.3×10−13, and kIF (∼400 K) =1.3±0.6×10−11 cm3 molecule−1 s−1, along with other reported quenching rate constants for the other halogen diatomics have been explained in terms of correlations based on the symmetry of the relevant potential energy surfaces.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.450722
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  • 4
    Digitale Medien
    Digitale Medien
    Temperature dependence of the rate of the electronic-to-electronic energy transfer from NF(b 1Σ+) to IF (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 7159-7166 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The temperature dependence of the rate of transfer of electronic energy from NF(b 1Σ+) to ground state IF(X 1Σ+) to form IF[B 3Π(O+)] has been determined using a chemiluminescence flowtube apparatus. The energy transfer rate depends on the vibrational distribution of the IF(X 1Σ+), but is independent of the vibrational distribution of the NF(b 1Σ+). The vibrational temperature of the IF[B 3Π(O+)] product was also greater than or equal to the vibrational temperature of the IF(X 1Σ+) reagent. These results are explained in terms of an energy transfer model requiring that the individual state-to-state rates are proportional to the corresponding Franck–Condon factors.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.451349
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  • 5
    Digitale Medien
    Digitale Medien
    Energy transfer and pooling between magnesium(3P) and calcium atoms (1986)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 90 (1986), S. 72-75 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j100273a017
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  • 6
    Digitale Medien
    Digitale Medien
    Photolysis of fluorine azide (FN3) at 193 nm (1986)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 90 (1986), S. 1931-1934 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j100400a038
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  • 7
    Digitale Medien
    Digitale Medien
    Dissociation of iodine chloride (ICl) by energy transfer from singlet oxygen (1985)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 89 (1985), S. 3277-3279 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j100261a022
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  • 8
    Digitale Medien
    Digitale Medien
    Azide mechanisms for the production of NCl metastables (1980)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 12 (1980), S. 741-753 
    Details
    ISSN: 0538-8066
    Schlagwort(e): Chemistry ; Physical Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The production of both the b1Σ+ and a1Δ states of NCl has been observed from the reaction of HN3 with flowing streams of Cl and F atoms. The results suggest that a two-step reaction sequence is responsible for the production of excited NCl, as follows: The rate contant (all products) for the first step is k(F + HN3) 〉 1 × 10-11 cm3/molecule sec. Comparison of this value to results obtained in a previous study of the F + HN3 system yields a value k(F + N3) = 2 × 10-12 cm3/molecule sec. The rate constant for the reaction of chlorine atoms with HN3 was determined to be k(Cl + HN3) 1 × 10-12 cm3/molecule sec. The difference between the Cl + HN3 and F + HN3 rates is interpreted in terms of an addition-elimination mechanism.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/kin.550121007
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  • 9
    Digitale Medien
    Digitale Medien
    Yields of singlet nitrenes from halogen atom - azide molecule reactions (1984)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 16 (1984), S. 977-993 
    Details
    ISSN: 0538-8066
    Schlagwort(e): Chemistry ; Physical Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Chemiluminescence from the a1Δ and b1Σ+ excited electronic states of nitrogen halide diatomics is observed when HN3 is allowed to react with mixtures of halogen atoms in a discharge-flow apparatus. Excited NF (a1Δ) is produced by the F + HN3 reaction, and NCl (a1Δ, b1Σ+) and NBr (a1Δ, b1Σ+) are produced by the F, Cl, + HN3 and F, Br + HN3 reactions, respectively. In the low-density limit, the yield of NF(a1Δ) was found to be near unity. The yields of the b1Σ+ states of NCl and NBr were determined to have a lower limit of ca. 10%. A number of results from these experiments, including direct observation of N3 radicals in the flow, support a hypothetical mechanism in which N3 acts as an intermediate. A second possible mechanism proceeding via an HNF intermediate cannot be ruled out.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/kin.550160805
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