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  • 1
    Electronic Resource
    Electronic Resource
    Numerical experiments for effects of elastic strain energy on decomposition process of binary alloy in a two-dimensional system (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 7683-7689 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: This paper is concerned with phase decomposition of a supersaturated solid solution in a two-dimensional system. We have investigated the behavior of numerical solutions to the Cahn equation including an elastic strain energy term in such a way as to follow the time evolution of composition modulation by computer. It is found that in our numerical experiment the introduction of the elastic strain energy gives no anisotropic effect on the crystallographic direction of the composition modulation, but leads to the decrease in the decomposition rate and quantity at the equilibrium state. Again, it is demonstrated that for a high solute alloy system inside the spinodal region a large circular precipitate is formed at the center of the flat matrix through a very complicated process accompanied with the aggregation and annihilation of particles. The results so obtained are discussed from a numerical point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458154
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  • 2
    Electronic Resource
    Electronic Resource
    Erratum: Gas kinetic approach for electron mobility in dense media [J. Chem. Phys. 89, 6420 (1988)] (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 6810-6811 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456706
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  • 3
    Electronic Resource
    Electronic Resource
    Gas kinetic approach for electron mobility in dense media (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 6420-6426 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The motion of electrons in nonpolar dense media is studied in the framework of gas kinetic transport theory. The observed external electric field dependence of electron mobility is explained by means of the solution of Boltzmann-type transport equation. Numerical calculations of the mobility, mean energy, and energy distribution function of electrons in liquid Ar and in liquid CH4 are presented and a good agreement with experimental data is obtained. Also the cases of gaseous Ar are studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455410
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  • 4
    Electronic Resource
    Electronic Resource
    The concentrated NO dimer in micropores above room temperature (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 776-777 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453579
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  • 5
    Electronic Resource
    Electronic Resource
    A new determination method of absolute adsorption isotherm of supercritical gases under high pressure with a special relevance to density-functional theory study (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 4196-4205 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A new determination method of an absolute adsorbed amount nab from the surface excess mass nex for high-pressure adsorption isotherms of a supercritical gas was proposed. The effectiveness of new method was examined by using the density-functional theory (DFT). The DFT study showed that this analysis can provide reasonable results; both of the absolute adsorbed amount determined from the proposed method and the DFT agreed within 5% at 90 MPa and only 1% below 5 MPa. Furthermore, we applied this new method to the experimental surface excess isotherm in the literature, which has a maximum. The analyzed absolute adsorption isotherm from the surface excess adsorption isotherm having a maximum were of IUPAC type I or type II. This method gave the thickness of the interfacial layer of the adsorbed phase. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1344926
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of the filament-induced magnetic field on the spatial distribution of primary electrons in magnetic multicusp source (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 67-73 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The influence of the filament on the discharge characteristics of the multicusp source (bucket source) is studied experimentally and theoretically. It is found that the magnetic field which is produced by the filament itself plays an important role to determine the trapped region of primary electrons by coupling with the magnetic multicusp field. Experimentally, arc efficiency varies drastically when only the direction of the filament current is changed. The measurements of the spatial profiles of the electron density and the temperature show that the plasma production occurs at the periphery of the chamber in the case of poor arc efficiency. Theoretical calculation also shows that in this case primary electrons are trapped in the local magnetic mirror of the multicusp field. The trapping condition depends on the magnetic field geometry around the filament, and, therefore, it is sensitive to the location of filament in the magnetic multicusp field as well as the strength and the direction of filament current.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139120
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  • 7
    Electronic Resource
    Electronic Resource
    m=1/n=1 density fluctuations in currentless high-β plasma in heliotron E (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 919-921 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: High-frequency density fluctuations with m=1/n=1 have been observed in a currentless high-β plasma. The line density was measured with a 5-ch FIR laser interferometer. A high-β plasma with 〈β〉∼2% was obtained with about 2-MW neutral beam injection into a currentless target plasma produced by second-harmonic ECRH. With weak gas puffing [β(0)(approximately-greater-than)1%], sawteeth-like oscillations accompanied by high-frequency fluctuations of about 2–5 kHz were observed on the line density. These fluctuations coincide with the soft x-ray fluctuations. From both signals the mode number of this instability is estimated to be m=1 and n=1. During the fluctuations, rapid enhancement (10%–20%) in the edge ion saturation current was also measured, which indicates that this instability causes particle loss from the bulk to the edge. The instability is quenched by a change in density profile from peaked to broad with intense gas puffing. This behavior is consistent with a theoretical analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138042
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  • 8
    Electronic Resource
    Electronic Resource
    Electronic state distribution of Xe+* formed by excitation transfer from Ne(3P00,2) to Xe+(2P03/2) at thermal energy (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 7451-7457 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Ne(3P00,2)+Xe+(5p5 2P01/2,3/2) excitation–transfer reaction has been studied by observing ultraviolet and visible emissions from Xe+* in a Ne flowing afterglow. The relative contribution of Xe+(2P03/2) and Xe+(2P01/2) to the excitation of Xe+* was examined by changing the [Xe+(2P01/2)]/[Xe+(2P03/2)] ratio with the addition of CH4 as a remover of the upper spin–orbit component. Since the intensity distribution of Xe+* lines was independent of the [Xe+(2P01/2)]/[Xe+(2P03/2)] ratio, it was concluded that the contribution of the Ne(3P00,2)+Xe+(2P01/2) reaction was insignificant. The Ne(3P00,2)+Xe+(2P03/2) reaction initially populates nine Xe+(6p,6p',7s,6) levels in the 13.86–16.60 eV range. The favored product levels are 6p' 2D03/2,5/2 and 7s 4P5/2 in the 16.36–16.43 eV range and 6p 4P05/2 at 13.88 eV, which are 0.2–0.3 and 2.7 eV below the entrance Ne(3P02)+Xe+(2P03/2) channel, respectively. The former near-resonant levels are excited by either direct curve crossings between attractive entrance potentials and flat exit ones or multiple curve crossings through a strongly attractive Ne−+Xe2+ ionic potential, while the latter nonresonant level is probably formed through the Ne−+Xe2+ ionic potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468498
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  • 9
    Electronic Resource
    Electronic Resource
    Ion mobility measurements for O+ and N+ in helium gas at 4.35 K (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 7098-7103 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The mobilities of O+ and N+ in He have been measured using a liquid helium cooled, selected ion drift tube, at 4.35 K. Results are compared with previous experimental work at higher temperatures and, in the case of O+, comparison is made with theoretical work, where a good agreement is found. The dependence of mobility on effective temperature is discussed in light of our previous work and our measurements are related to features of the ion–atom potential. In order to facilitate further theoretical analysis, recommended values of mobility are tabulated for O+ and N+ in He and also for O+2, N+2, and CO+ in He. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470338
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  • 10
    Electronic Resource
    Electronic Resource
    Electronic state distribution of Xe+* formed by excitation transfer from He(2 3S) to Xe+(2P03/2) at thermal energy (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 8726-8736 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The formation process of Xe+* in the He afterglow reaction of Xe has been studied by observing Xe ii lines in the ultraviolet and visible regions. Sixty one Xe+* states in the 13.86–19.49 eV range were excited by the He(2 3S)+Xe+(5p5 2P03/2) excitation-transfer reaction. It was found that Xe+* was not formed by the He(2 3S)+Xe(6s 3P02) Penning type reaction and the He++Xe(6s 3P02) charge-transfer reaction. There were some unclassified Xe ii lines, which occupied 14% of the total production of Xe+*. Most of them were attributed to Xe+ transitions from unknown high energy Xe+* states in the 18–19.5 eV range. The electronic state distribution of individual Xe+* levels has been determined by taking account of radiative cascade for low lying electronic levels. The He(2 3S)+Xe+(2P03/2) reaction expressed no resonant character. The electronic state of Xe+* was distributed more widely than those of Ar+* and Kr+* in the He(2 3S)+Ar+(3p5 2P03/2), He(2 3S)+Kr+(4p5 2P01/2), and He(2 3S)+Kr+(4p5 2P03/2) reactions. The excitation mechanism of rare gas cations due to collisions between a rare gas metastable atom and a rare gas ion is discussed. The lack of the excitation processes of Kr+* and Xe+* by the He++Kr(3P02) and He++Xe(3P02) reactions was attributed to the absence of near-resonant Kr+(5p) and Xe+(6p) states whose excitation satisfies the selection rule of Δl=±1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468067
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