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  • 1
    Electronic Resource
    Electronic Resource
    Fluorescence yields from photodissociative excitation of formic acid, methyl formate, and acetic acid in the vacuum-ultraviolet region (1988)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 92 (1988), S. 3764-3768 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100324a015
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  • 2
    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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  • 3
    Electronic Resource
    Electronic Resource
    Quantitative photoabsorption and fluorescence spectroscopy of H2S and D2S at 49–240 nm (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 4353-4361 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photoabsorption and fluorescence cross sections of H2S and D2S were measured in the 49–240 nm region using synchrotron radiation as a light source. Fluorescence from photoexcitation of H2S appears at 49–97 nm but not in the longer wavelength region. Fluorescence spectra were dispersed, and used to identify the emitters to be H2S+(A˜), SH+(A), and H(n〉2). The fluorescence quantum yield is about 6%. Photoexcitation of D2S at 49–96 nm produces fluorescence with a quantum yield of about 5%. The emitters are identified from the fluorescence spectra to be D2S+(A˜), SD+(A), and D(n〉2). The Franck–Condon factors for the SH+ and SD+ (A–X) transitions were determined. The SD(A–X) fluorescence was observed from photoexcitation of D2S at 100–151 nm, for which the fluorescence cross section and quantum yield were measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451897
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  • 4
    Electronic Resource
    Electronic Resource
    Quantitative study on the photoexcitation process of SiF4 at 49–120 nm (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 1152-1156 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photoabsorption and fluorescence cross sections of SiF4 were measured in the 49–120 nm region using synchrotron radiation as a light source. Absorption bands were tentatively assigned to Rydberg states and their oscillator strengths were determined. The fluorescence was dispersed to identify the emitting species. In the 49–58 nm region, the emitter is attributed to the excited SiF+4 (D˜) ion. In the 92–98 nm region, the fluorescence is likely produced by the excited SiF@B|3 radical. Photodissociation process of SiF4 in the extreme ultraviolet region is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452259
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  • 5
    Electronic Resource
    Electronic Resource
    Rotational state-to-state energy transfer of NH2(A˜ 2A1) in beam-gas condition (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 10578-10586 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The detailed study on the rotational state-to-state energy transfer (RSET) of NH2(A˜ 2A1) at a relative translational energy of about 360 cm−1 has been reported herein, by combining self-breakdown pulsed dc discharge and a photon counting technique. The transferred populations from the parent levels to the daughter levels have been obtained through the spectral simulations. It is clear that the rotational state distributions depend not only on the rotational quantum numbers of the initial and collisionally populated states, but also on the quantum number Ka. It is interesting to find that the probability of RSET behaves differently depending on the rotational quantum numbers of the parent levels, i.e., the exponential angular momentum transfer law (AMT) is preferred with the relatively low rotational levels, while the exponential energy gap law is preferred with the relatively high levels. According to the sudden approximation and the theory of Osborne et al., the experimental results are explained qualitatively. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.480410
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  • 6
    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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  • 7
    Electronic Resource
    Electronic Resource
    Fluorescence from VUV excitation of formaldehyde (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 4228-4233 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photoabsorption and fluorescence cross sections of H2CO were measured in the 105–180 nm region using synchrotron radiation as a light source. Vacuum ultraviolet (VUV) emission from excited photofragments was dispersed and identified to be the CO(A 1Π→X 1Σ+) system. The vibrational population of CO(A) was determined from the fluorescence spectrum and was used to study the photodissociation mechanism. The threshold for the production of the VUV emission is at 140.3 nm. UV emission from HCO* was observed below a threshold of 147.5 nm. The upper limit of the dissociation energy, D0(H–HCO), determined from the HCO emission threshold is 3.61±0.03 eV. The quantum yield for the production of either CO* or HCO* is a smooth function of the excitation wavelength, from which two dissociative states with vertical energies at 8.69 and 10.7 eV are derived. The VUV and UV fluorescences have maximum quantum yields at 116 nm of about 1.6% and 0.23%, respectively. The photodissociation process of H2CO in VUV is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451793
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  • 8
    Electronic Resource
    Electronic Resource
    Fluorescence from extreme ultraviolet photoexcitation of CF4 (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 6294-6300 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photoabsorption and fluorescence cross sections of CF4 were measured in the 50–130 nm region using synchrotron radiation as a light source. Oscillator strengths for Rydberg states were determined from the absorption cross sections measured. The fluorescence spectra were dispersed to identify the emission species. Fluorescences appear in the excitation wavelength regions of 50–57.4, 75–80, and 85–95 nm, in which the emitters are attributed to CF+4, CF2, and CF3, respectively. The fluorescence quantum yield has been determined from the absorption and fluorescence cross sections measured simultaneously. The yield has a maximum of 26% at 55 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451459
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  • 9
    Electronic Resource
    Electronic Resource
    Multiphoton ionization and density functional studies of pyrimidine–(water)n clusters (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 117 (2002), S. 3701-3710 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The multiphoton ionization of pyrimidine–(water)n clusters at conditions of supersonic expansion is studied using a time-of-flight mass spectrometer at the wavelengths of 355 and 532 nm. At both wavelengths, a series of protonated C4H4N2–(H2O)nH+ cluster ions are obtained. The production of these protonated cluster ions requires an intracluster proton transfer reaction. The protonated products are also suggested to relate to the excitation or ionization of water molecules. Ab initio calculations show that the dissociation of C4H4N2–(H2O)n+ cluster ions prefer to produce protonated ions. Two ways of producing protonated cluster ions are discussed. The reaction mechanism of intracluster proton transfer and the geometric structures of pyrimidine–(water)n clusters were depicted. The proton pulling effect and the atomic charge changes in the protonated cluster ions are also discussed. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1494783
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  • 10
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    A double-stage pulsed discharge fluorine atom beam source (2006)
    American Institute of Physics
    Details
    Publication Date: 2006-01-01
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Institute of Physics
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