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  • 1
    Electronic Resource
    Electronic Resource
    Vibrational energy transfer in HBr–C2D2 mixtures (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 140-144 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Infrared fluorescence from HBr and C2D2(ν3) has been measured following irradiation of HBr–C2D2 mixtures with a pulsed HBr laser. The fluorescence decay from both species yields the total rate constant for deactivation of HBr(v=1) by collisions with C2D2, k=(1.6±0.1)×104 s−1 Torr−1. The exponential rise of C2D2(ν3) fluorescence is characterized by the rate constants k=(3.4±0.2)×104 s−1 Torr −1 for collisions with both C2D2 and HBr, and k=(5.5±2.3)×103 s−1 Torr−1 for collisions with added Ar. A model developed to fit the observations implies that ν3 is populated indirectly by transfer from another, unidentified, level of C2D2, and that the exponential rise constants refer to transfer from ν3 to this level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.449806
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  • 2
    Electronic Resource
    Electronic Resource
    Ultra-low temperature kinetics of neutral–neutral reactions: New experimental and theoretical results for OH+HBr between 295 and 23 K (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 1748-1751 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The first determination of the rate of reaction of OH radicals with HBr at temperatures below 249 K is reported. Rate constants measured from 295 to 23 K increase monotonically with decrease in temperature and are faster than has previously been thought at the temperatures present in the mid and low stratosphere. The observed negative temperature dependence is well predicted by a simple formula deduced from quantum scattering calculations employing the rotating bond approximation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467733
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  • 3
    Electronic Resource
    Electronic Resource
    Ultralow temperature kinetics of neutral–neutral reactions. The technique and results for the reactions CN+O2 down to 13 K and CN+NH3 down to 25 K (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 4229-4241 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: An entirely new experimental method is described which enables the rate constants of neutral–neutral gas-phase reactions to be measured at ultralow temperatures. The measurements are made by applying the pulsed laser photolysis (PLP), laser-induced fluorescence (LIF) technique of studying the kinetics of free radical reactions in the ultracold environment provided by the gas flow in a Cinétique de Réaction en Ecoulement Supersonique Uniforme (CRESU) apparatus. The experimental method is described in some detail and its application and limitations are discussed. Results are reported for the reactions of CN radicals with O2 and NH3. For reaction (1) between CN and O2 data are reported for the temperature range T=13–295 K and the rate constants are well-matched by the expression k1(T)=(2.49±0.17)×10−11 (T/298)(−0.63±0.04) cm3 molecule−1 s−1. For reaction (2) between CN and NH3, rate constants in the temperature range T=25–295 K fit the expression k2(T)=(2.77±0.67)×10−11 (T/298)(−1.14±0.15) cm3 molecule−1 s−1. The kinetic data are discussed in terms of the latest quantum chemical and reaction rate theories for these systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467227
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  • 4
    Electronic Resource
    Electronic Resource
    Ultra-low temperature kinetics of neutral–neutral reactions: The reaction CN+O2 down to 26 K (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 8798-8800 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A new method is described which enables the measurement for the first time of the rates of neutral–neutral gas-phase reactions at temperatures down to 26 K (and in the future, below). Results for the reaction of CN radicals with O2 are presented and discussed in terms of current theoretical treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463349
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  • 5
    Electronic Resource
    Electronic Resource
    High-frequency fatigue testing of ferroelectric memory capacitors (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3205-3208 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Fatigue testing of typical process-development ferroelectric capacitors requires application of controlled high-frequency waveforms to a capacitor (in the nF range) whose impedance at frequencies of interest is only a few Ω. Only experimental setups which have been designed with this fact in mind will give meaningful results. We analyze a range of typical setups and give the maximum fatigue frequency for each. A simple, standard setup may only allow frequencies of 20 kHz (109 cycles in an overnight run). A well-optimized setup will work at frequencies in the MHz range, allowing reaching 1011 cycles in an overnight run.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142579
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