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  • American Physical Society  (48)
  • American Institute of Physics  (34)
  • American Institute of Physics (AIP)  (30)
  • Oxford University Press  (20)
  • MDPI Publishing
  • 1985-1989  (132)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Concentration fluctuations in polymer blend thermodynamics (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 1704-1708 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Monomer concentration fluctuations in high molecular weight polymer blends are investigated. The fluctuations reduce the value of the χ interaction term in the Flory–Huggins free energy by a factor of (1-6/π2) and add a concentration and molecular weight contribution which decreases phase stability for off-critical compositions. Except at the critical point, the spinodal values are smaller than those predicted from a Flory–Huggins-type free energy. For an incompressible blend with components of equal size N, the corrections to the spinodal were found to vary as ||1−2φ0||4/3N−1/3, where φ0 is the mean concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455116
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  • 2
    Electronic Resource
    Electronic Resource
    The torsional Raman spectra of C2H6 and C2D6 (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 3327-3334 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The torsional Raman spectra of C2H6 and C2D6 have been experimentally investigated with an improved conventional Raman spectrometer. Wave numbers and absolute cross sections of all observed bands have been satisfactorily interpreted within the experimental accuracy by means of a simple, pure-torsional Hamiltonian and a model for the torsional dependence of the molecular polarizability. The effective threefold potential barrier parameters for C2H6 have been taken from the recent literature, whilst for C2D6 the values V3eff (C2D6)=990±2 cm−1 and V6eff (C2D6)=7.9±1 cm−1 were obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456908
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  • 3
    Electronic Resource
    Electronic Resource
    Gas phase Raman scattering cross sections of benzene and perdeuterated benzene (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 2909-2914 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Depolarization ratios and Raman scattering differential cross sections of the Raman active fundamental bands of gas phase C6H6 and C6D6 are reported. These quantities are first reduced to derivatives of the molecular polarizability with respect to symmetry coordinates, and then these derivatives are interpreted in terms of bond properties, proving that the bond polarizability concept is as useful for aromatic systems as for other smaller nonaromatic molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455942
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  • 4
    Electronic Resource
    Electronic Resource
    Linear kinetic theory in stochastic media (1989)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 2498-2511 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Linear kinetic particle transport in stochastic heterogeneous media is discussed. The analysis includes scattering in a three-dimensional setting and deals with arbitrary time-dependent statistics. Ensemble-average operators are used to derive two independent complete descriptions for the ensemble-averaged angular flux. The first description consists of an infinite system of integral, renewal-like equations for averaged flux values over spatially dependent, increasingly smaller sets. The second approach results in an infinite system of kinetic, balancelike equations for locally averaged flux values. Both types of equations include averagings over transitional sets of states that change locally of physical properties. Previous results are recovered from the limit form of these equations for no-memory statistics and purely absorbing media. Also, the Levermore–Pomraning–Wong proposed models are shown to correspond to truncated forms of these equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528530
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  • 5
    Electronic Resource
    Electronic Resource
    Generalized exponential, circular, and hyperbolic functions for nonlinear wave equations (1988)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 29 (1988), S. 1847-1853 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Wave functions are presented in the form of generalized exponentials that are solutions of some of the most usual linear and nonlinear wave equations. The solutions are given in terms of the elliptic functions of Jacobi and presented in a form as similar as possible to the usual circular functions. Some simple theorems are demonstrated to present the solutions as the simplest possible extension of the usual exponentials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.527887
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  • 6
    Electronic Resource
    Electronic Resource
    Transmission coefficients in anharmonic symmetrical potentials (1987)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 28 (1987), S. 636-642 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Barrier transmission in potentials of the type V(x)=Ax2+Bx4 is studied using the phase integral method, the same as the JWKB approximation in lower orders. Elliptic functions are used for the classical solutions. The transmission coefficient is calculated for all signs and values of A and B that give a potential barrier.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.527650
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  • 7
    Electronic Resource
    Electronic Resource
    Generalized Fourier transforms for nonlinear systems (1989)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 1871-1876 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: A simple generalization is presented of the usual Fourier transforms using generalized exponential and Fourier series developed previously for nonlinear systems. The expressions are given in terms of Jacobi elliptic functions in a form as close as possible to the Fourier transform. There is a pair of transforms for each value of the Jacobi parameter m. Simple applications are presented, one of which gives the generalized Yukawa potential and another that gives the generalized Breit–Wigner potential: Both correspond to the generalized Klein–Gordon equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528274
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  • 8
    Electronic Resource
    Electronic Resource
    Electron-beam-pumped two-dimensional semiconductor laser array with tilted mirror resonator (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 1303-1305 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The spatial and spectral emission characteristics of a two-dimensional CdS laser array, pumped by a high-energy electron beam, have been experimentally investigated. The near-field emission from each cell or array element is found to arise from a virtual line located behind the cell. The results are consistent with a geometric ray model of a tilted mirror resonator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99144
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  • 9
    Electronic Resource
    Electronic Resource
    The growth and structure of Cd0.95Fe0.05Te thin films grown by radio-frequency sputtering (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 3928-3933 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The growth and structure properties of Cd1−xFexTe thin films prepared by rf sputtering were studied. Films with thicknesses in the range 0.75–2.45 μm were grown onto Corning glass substrates at temperatures between 50 and 300 °C in an argon atmosphere at a pressure of 3 mTorr. The deposition rate was determined by film thickness profile analysis. Transmission electron microscopy and x-ray diffractometry techniques were used to evaluate the structure, grain size, and orientation of the films. These properties were found to be related to the substrate deposition temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341348
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  • 10
    Electronic Resource
    Electronic Resource
    Large grain size CdTe films grown on glass substrates (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 410-413 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Polycrystalline films of CdTe (with grain size up to 100 μm) were grown by the hot wall close-spaced vapor transport technique in an Ar atmosphere. In most cases they grow on a zinc-blende type of structure with a preferential orientation of growth along the 〈111〉 directions, as shown by x-ray diffraction studies. The grain size in the films presents a maximum around 3.5 Torr, as well as a minimum of preferential orientation. The grain size shows an exponential increase in the substrate temperature (Ts) 450–650 °C range. For Ts≤600 °C, the films grow with a 〈111〉 preferential crystallographic orientation, whereas for Ts〉600 °C the preferential orientation changes to the 〈220〉 directions. For Ts〉600 °C, the films show a mixture of zinc-blende and wurtzite phases, according to the x-ray analysis. A Te crystalline phase is detected for Ts〉550 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340254
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