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  • 1
    Electronic Resource
    Electronic Resource
    Square well orthobaric densities via spinodal decomposition (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 5683-5688 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Orthobaric densities of a square well fluid are obtained by means of a molecular dynamics simulation. Hard wall boundary conditions in one direction and periodic boundary conditions in the other two, added to a mean density close to the critical have two effects: a fast spinodal decomposition that condenses a slab of liquid at the center of the box plus a better sampling of the whole orthobaric curve. Results for the liquid densities compare well with previously obtained data while vapor densities are more sensitive to capillary effects. These finite size effects are analyzed within a lattice gas model, especially those produced by changes in box size and mean density. The method is well suited to predict orthobaric and miscibility curves for binary mixtures once the orthobaric curves of each molecular species have been properly adjusted to experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452546
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  • 2
    Electronic Resource
    Electronic Resource
    Extreme mode selectivity in a dissociating van der Waals molecule: Complexes of aminotetrazine and argon (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 7302-7303 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photodissociation of aminotetrazine-Ar and aminotetrazine-Ar2 was studied using supersonic jet spectroscopy. Excitation of aminotetrazine-Ar to the levels 16b2, 16a2, and 6a1 (429, 505, and 606 cm−1 vibrational energy, respectively) produced photodissociation lifetimes that differed by more than two orders of magnitude. Excitation of these three levels in aminotetrazine-Ar2 caused large changes in the branching ratio between the two dissociation products, aminotetrazine-Ar and aminotetrazine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457299
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  • 3
    Electronic Resource
    Electronic Resource
    Study of the electronic-to-vibrational energy transfer in the quenching process of Na*(3 2P) with N2(1Σ+g,v=0). A quantal close coupling calculation (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 155-161 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Electronic-to-vibrational energy transfer has been studied by solving numerically the close-coupling equations, in the T-shape configuration, on the two lowest electronic states of the Na–N2 system. The diabatic potential surfaces were taken from Archirel and Habitz while the interelectronic coupling was modeled by different Gaussian-type functions. Different sets of parameters for the coupling were used in order to study the final vibrational distributions of N2. Finally, partial quenching probabilities are presented and compared with previous theoretical and experimental works.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457494
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  • 4
    Electronic Resource
    Electronic Resource
    Time-differential perturbed angular correlations investigation of the (NH4)2ZrF6 thermal decomposition (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 1271-1274 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Via the TDPAC technique and complementary x-ray diffraction analysis, the thermal decomposition of (NH4)2ZrF6 has been observed to occur in the range 400–800 K according to the thermolysis scheme (NH4)2ZrF6→485 KNH4ZrF5→560 KNH4Zr2F9 →620 KZrF4→760 KZrO2. Assuming that the first transformation takes place through the simple chemical reaction (NH4)2ZrF6→NH4ZrF5+NH4F, the corresponding activation energy has been determined to be Ea=(82±6) kJ/mol. The hyperfine parameters of the NH4Zr2F9 decomposition product have been determined between 14 and 560 K. A complete analogy with the isomorphous compound NH4Hf2F9 was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448448
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  • 5
    Electronic Resource
    Electronic Resource
    Multiseries Lie groups and asymptotic modules for characterizing and solving integrable models (1989)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 1662-1673 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: A multiseries integrable model (MSIM) is defined as a family of compatible flows on an infinite-dimensional Lie group of N-tuples of formal series around N given poles on the Riemann sphere. Broad classes of solutions to a MSIM are characterized through modules over rings of rational functions, called asymptotic modules. Possible ways for constructing asymptotic modules are Riemann–Hilbert and ∂¯ problems. When MSIM's are written in terms of the "group coordinates,'' some of them can be "contracted'' into standard integrable models involving a small number of scalar functions only. Simple contractible MSIM's corresponding to one pole, yield the Ablowitz–Kaup–Newell–Segur (AKNS) hierarchy. Two-pole contractible MSIM's are exhibited, which lead to a hierarchy of solvable systems of nonlinear differential equations consisting of (2+1)-dimensional evolution equations and of quite strong differential constraints.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528251
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  • 6
    Electronic Resource
    Electronic Resource
    The NBS triple quadrupole tandem mass spectrometer (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1702-1705 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A detailed description is provided of a triple quadrupole (QQQ) tandem mass spectrometer (MS/MS) which is kinetically well behaved and can be configured to use either a molecular beam target (type A) or collision chamber (type B) configuration. Its unique capabilities are being used to explore design criteria essential for (i) absolute cross-section measurements, and for (ii) the development of standardized operating conditions for generic, instrument-independent spectral databases for collisionally activated dissociation (CAD).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139371
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  • 7
    Electronic Resource
    Electronic Resource
    Electronic defect levels in continuous wave laser annealed silicon metal oxide semiconductor devices (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 3079-3084 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of laser treatment on the bulk and interface states of the Si-SiO2 structure has been investigated. The annealing was performed prior to the gate metallization using a continuous wave Ar+ laser. For low laser powers the interface state density seems to decrease slightly in comparison with untreated samples. However, for the highest irradiating laser powers a new bulk level at 0.41 eV above the valence band with concentrations up to 1015 cm−3 arises probably due to the electrical activation of the oxygen diluted in the Czochralski silicon. Later postmetallization annealings reduce the interface state density to values in the 1010 cm−2 eV−1 range but leave the concentration of the 0.41-eV center nearly unchanged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341546
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  • 8
    Electronic Resource
    Electronic Resource
    A high magnetic field EPR spectrometer (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 3681-3684 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe a tunable electron paramagnetic resonance (EPR) spectrometer designed to operate at frequencies between 160 and 525 GHz and magnetic fields of up to 20 T. To operate in such a broad frequency range we use a very stable optically pumped far infrared laser. The performance of the spectrometer has been measured with solid and liquid samples. This allows us to outline the potential uses of the spectrometer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140474
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  • 9
    Electronic Resource
    Electronic Resource
    Band-edge alignment in heterostructures (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 1877-1878 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Conduction-band and valence-band energies are presented for ternary III-V compounds in a novel way. These data are used to evaluate new material combinations for heterostructure devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102158
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  • 10
    Electronic Resource
    Electronic Resource
    Large-area defect-free silicon-on-insulator films by zone-melt recrystallization (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 901-903 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Large areas of defect-free silicon-on-insulator (SOI) films have been obtained by softening (lowering the viscosity) a layer underlying the silicon film. During zone-melt recrystallization this sublayer provides a stress relief mechanism and relieves mechanical constraints for the growing crystal. Using this technique we have been able to obtain recrystallized silicon films that show significant improvement over the typical material obtained in samples without the soft layer recrystallized under identical conditions. We have reproducibly obtained SOI films that contain large areas that are free of subgrain boundaries as well as other defects such as twin boundaries and threading dislocations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99267
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