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  • 1
    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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  • 2
    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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  • 3
    Electronic Resource
    Electronic Resource
    Quantitative absorption and fluorescence spectroscopy of BCl3 in vacuum ultraviolet (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 6653-6657 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The absorption and fluorescence cross sections and the fluorescence quantum yields of BCl3 were measured in the 106–190 nm region. A visible emission band appears at excitation wavelengths shorter than 173 nm and two ultraviolet emission bands appear at wavelengths shorter than 126.5 nm. Fluorescence spectra were dispersed to identify emitting species that are attributed to BCl@B|2. The upper limits of the potential energies for the observed emitting states are 2.56, 5.19, and 5.70 eV, as determined from the fluorescence thresholds. The photodissociation process of BCl3 is discussed in accord with the fluorescence observed. The radiative lifetimes of the visible band vary over the 5–24 μs range, and the quenching rate constants of the excited state by BCl3 vary in (1.2–2.7)×10−10 cm3/s, both depending on fluorescence wavelength.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455387
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  • 4
    Electronic Resource
    Electronic Resource
    Quantitative absorption and fluorescence spectroscopy of Cd(CH3)2 in vacuum ultraviolet (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 160-165 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photoabsorption and fluorescence cross sections of Cd(CH3)2 were measured in the 115–270 nm region using synchrotron radiation as a light source. Vibrational structures superimposing on absorption continua were observed in the 140–230 nm region. Fluorescence appears at excitation wavelengths shorter than 184 nm. Fluorescence produced at 123.6, 147, and 157.5 nm was dispersed to identify the emission to be mainly from excited Cd (326.1 nm). Emissions from excitation of Cd(CH3)2 at 157, 193, and 248 nm via a multiphoton excitation process were investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455499
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  • 5
    Electronic Resource
    Electronic Resource
    Fluorescence from photoexcitation of C2H2 at 50–106 nm (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 4000-4007 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photoabsorption and fluorescence cross sections of C2H2 were measured in the 50–106 nm region using synchrotron radiation as a light source. Fluorescence observed at several excitation wavelengths was dispersed to identify the fluorescing species that are excited C2H*, C@B|2 , CH*, H*, and possibly C2H+*2 . The photodissociation process of C2 H2 leading to the formation of fluorescing species is discussed. The C2 (C–A) emission observed at 92.3 and 95.5 nm is produced by the molecular elimination process associated with superexcited state(s). Fluorescence spectra from the two-photon excitation of C2 H2 at 157.5 and 193 nm were also observed and compared with those of single-photon excitation at the equivalent excitation energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455810
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  • 6
    Electronic Resource
    Electronic Resource
    CH(A, B–X ) fluorescence from vacuum ultraviolet excitation of CH3 (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 2797-2802 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: CH3 was produced by the reaction of Cl or F with CH4 in a flow tube. The CH(A 2Δ, B 2Σ−–X 2Πr) fluorescence was observed from photoexcitation of CH3 at 157 nm by a single-photon excitation process and at 193 nm by two-photon excitation. No emission was detected at 248 nm. The fluorescence cross section at 157.5 nm was estimated to be about 8×10−19 cm2 with an uncertainty of factor 3. The CH2 emission is negligibly weak. The photodissociation process for the absorption continua of CH3 is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455033
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  • 7
    Electronic Resource
    Electronic Resource
    Sulfur dioxide fluorescence from vacuum ultraviolet dissociative excitation of sulfur trioxide (1987)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 3262-3265 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100296a032
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  • 8
    Electronic Resource
    Electronic Resource
    Line shapes of strongly radiation-damped nuclear magnetic resonance signals (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 7455-7462 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Line shapes of strongly radiation-damped nuclear magnetic resonance (NMR) signals are theoretically analyzed. Analytical expressions for the radiation-damped signals in the frequency domain are reported for the first time. It is shown that the line shapes are generally dependent on the flip angle θ0 of the excitation pulse. In the range of 0≤θ0〈π, the peak height increases linearly, but the linewidth decreases monotonically with the flip angle. An oscillating feature is predicted for the line shape when θ0(approximately-greater-than)π/2. The theoretical predictions are confirmed by the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465727
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  • 9
    Electronic Resource
    Electronic Resource
    Microstructure and dielectric properties of silicon nitride films deposited by electron cyclotron resonance plasma chemical vapor deposition (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 5978-5984 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The microstructures and dielectric properties of silicon nitride (SiNx) films have been investigated. These films were prepared by permanent magnet electron cyclotron resonance plasma chemical vapor deposition by varying the substrate temperature between 56 and 400 °C and microwave power between 65 and 520 W. It exhibits a fractal structure with fractal dimension Df=1.45 or fractal-like structures for the films deposited without additional heating. When the substrate temperature is raised above 200 °C, the uniform dense structure can be obtained. The frequency dependence of the dielectric constant (ε′) in the frequency range 5–106 Hz for the films deposited below 100 °C follows a three fractional power law of (ε′−ε∞′)∝ωni−l (i=1, 2, and 3). The exponents ni are n1=0.73–0.93, n2=0.95–0.98, and n3=0.87–0.99 in the frequency range of 5–102 Hz, 102–104 Hz, and 104–106 Hz, respectively. The frequency dependence of ε′ also follows a single power law of (ε′−ε∞′)∝ωn−1 with n=0.95–0.82 for the films deposited in the substrate temperature range of 200–400 °C. The dielectric property of the single power law is in agreement with the intrinsic dielectric property of Si3N4 films, which is related to electron hopping conduction. The dielectric property of the fractional power law is considered to relate to the fractal structure of SiNx films. These are partially in agreement with that of the many-cluster anomalous conduction theory of fractal structure. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367463
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  • 10
    Electronic Resource
    Electronic Resource
    Deposition of diamond-like carbon films by electrolysis of methanol solution (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 1074-1076 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By electrolysis of the methanol solution, an attempt was made to deposit diamondlike carbon (DLC) films on silicon substrate at temperature of less than 60 °C. Substrates were negatively biased with a dc potential of 0 to −3000 V. IR spectra showed that the O–H, C–H, and C–O vibration bands of electrolyte decreased remarkably after electrolysis and a new peak characterized as the C=C bond appeared. The deposited films were characterized as DLC films by Raman spectroscopy. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116935
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