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  • 1990-1994  (44)
  • 1985-1989  (22)
  • 1975-1979  (4)
  • 1
    Electronic Resource
    Electronic Resource
    High-power stable chemical oxygen iodine laser (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 79-83 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A high-power chemical oxygen iodine laser system has been developed with industrial applications in mind. The present system shows fairly high efficiency, good stability, and reasonably good beam quality applicable to practical applications. Highly efficient power transmission through optical fibers has been demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347660
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of water vapor in the chemically excited oxygen flow generated from the reaction of Cl2 with alkaline H2O2 (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 6428-6433 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The estimation for the water vapor included in chemically generated excited oxygen flow and the influence of the water vapor on the excited oxygen species are presented. The concentration of the water vapor in the flow was changed by altering the temperatures of the solution and the cold trap and then, it was estimated by measuring the the pressure change and by measuring the concentration of the excited oxygen molecules. The fraction of O2(1Δ) to the total oxygen did not change with the water vapor pressure, but the concentration of O2(1Σ) changed significantly. Applying the high sensitivity of O2(1Σ) concentration to H2O, the estimation of a small quantity of water vapor concentration was available in the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346865
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  • 3
    Electronic Resource
    Electronic Resource
    Stoichiometry measurement and electric characteristics of thin-film Ta2O5 insulator for ultra-large-scale integration (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 375-380 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Elastic recoil detection and Rutherford backscattering were adapted to a stoichiometric study of thin Ta2O5 films deposited on Si substrates by means of the reactive sputtering (SP) and chemical-vapor-deposition (CVD) method. Before annealing the samples it was observed that (i) the atomic ratio of oxygen to tantalum in the SP films agreed with 5/2 within the experimental accuracy and (ii) the CVD films have less oxygen content than the other samples. The specimens were annealed for 30 min under the following three conditions: (a) in dry oxygen ambient at 800 °C; (b) in ozone atmosphere under ultraviolet irradiation (UV ozone) at 300 °C; and (c) two-step treatment of (a) after the (b) process. Each oxidizing process has shown a certain positive effect on the thin CVD samples. Among them, the two-step treatment has proven to be very effective to restore the stoichiometry of 5/2 in the CVD films. Additionally the thickness of contaminant carbon films on the surface of the samples has been reduced by annealing in the oxidizing atmosphere. The relationship between the chemical composition and the electric properties of the samples is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354120
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Solvent isotope effect on ion mobility in water at high pressure. Conductance and transference number of potassium chloride in compressed heavy water (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 280-287 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Limiting molar conductances of the K+ and Cl− ions in heavy and light water have been determined at 25 °C as a function of pressure up to 2 kbar from the measured conductances and transference numbers of KCl. The residual friction coefficients (Δζ) are obtained for the cation and the anion in D2O and H2O by using the determined limiting conductance and the bulk viscosity of solvent and compared with the corresponding values predicted by applying the Hubbard–Onsager (HO) dielectric friction theory at various pressures below 1 kbar. At atmospheric and high pressures Δζ of the K+ ion in D2O is larger than that in H2O just as predicted by the HO theory, but Δζ of the Cl− ion in D2O is smaller than that in H2O on the contrary to the theoretical prediction. The reverse solvent isotope effect on Δζ(Cl−) suggests that a microscopic viscosity in the vicinity of the relatively large ion is smaller than the bulk viscosity used in the continuum theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.449821
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  • 5
    Electronic Resource
    Electronic Resource
    Solvent isotope effect on mobilities of potassium and chloride ions in water at high pressure. II. A low temperature study (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 4678-4683 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Limiting molar conductances of the K+ and Cl− ions in heavy and light water have been determined at 5 °C as a function of pressure up to 1500 kgf cm−2 (1 kgf cm−2=0.9807×105 Pa) from the measured conductances and transference numbers of KCl. The residual friction coefficients (Δζ) are obtained for the cation and anion in D2O and H2O by using the determined limiting conductance and the bulk viscosity of solvent, and they are compared with the corresponding values predicted by applying the Hubbard–Onsager (HO) dielectric friction theory at various pressures below 1000 kgf cm−2. At atmospheric and high pressures, the solvent isotope and temperature effects on Δζ observed for the K+ ion are qualitatively in agreement with the theoretical prediction. However, the slightly positive pressure coefficients of Δζ(K+) are obtained in both solvents at 5 °C contrary to the theoretical prediction. Furthermore, Δζ(K+) in D2O at 5 °C is smaller than the theoretical one. These results suggest that another mechanism such as the passing through cavities one plays a more important role in ion migration of the K+ ion at lower temperatures and in D2O. On the other hand, the reverse solvent isotope and temperature effects on Δζ(Cl−), and the negative values of Δζ(Cl−) are found. These anomalies cannot be explained by the continuum theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452708
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  • 6
    Electronic Resource
    Electronic Resource
    Laser-prearc railgun: Development for the application to a fuel pellet injector of a nuclear fusion reactor (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3102-3107 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The laser-prearc railgun, that utilizes the phenomenon of laser-induced arc formation, was constructed and tested with plastic pellet projectiles. We envision our railgun as especially well suited as a solid hydrogen pellet injector for magnetic confinement fusion. The system consisted of a gas gun for preacceleration of a pellet and a railgun for its primary acceleration. A Q-switched ruby laser was used to induce electrical breakdown of propellant helium gas behind a dielectric pellet in the railgun. The present railgun was shown to accelerate a plastic pellet up to a velocity of 2.4 km/s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142561
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  • 7
    Electronic Resource
    Electronic Resource
    Solvent isotope effect on mobilities of potassium and chloride ions in water at high pressure. III. A high temperature study (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 2548-2552 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Limiting molar conductances of the K+ and Cl− ions in heavy and light water have been determined at 45 °C as a function of pressure up to 2000 kgf cm−2 (1 kgf cm−2 =0.9807×105 Pa) from the measured conductances and transference numbers of KCl. The residual friction coefficients (Δζobs ) of the K+ and Cl− ions obtained by using their limiting molar conductances and the bulk viscosity of solvent are compared up to 1000 kgf cm−2 with the corresponding values (ΔζHO ) predicted by the Hubbard–Onsager dielectric friction theory. As predicted, Δζobs for the cation in H2 O is smaller than that in D2 O and slightly decreases with increasing pressure, while its value in D2 O is almost invariant in the pressure range studied. The failure of the continuum theory in D2 O indicates that the effect of the open structure of water on the cation migration cannot be neglected even at 45 °C because of stronger hydrogen bonds in D2 O than in H2 O. For the anion, on the other hand, the continuum theory shows more serious limitations: (i) Δζobs (Cl−) in H2 O is not smaller than that in D2 O even at 45 °C with a large difference at high pressures and (ii) Δζobs (Cl−) becomes negative in both types of water at high pressures. The difference in Δζ(Cl−) between theory and experiment at 45 °C, however, becomes much smaller than that at lower temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457947
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  • 8
    Electronic Resource
    Electronic Resource
    Observation of chemical laser oscillation in the visible range (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2400-2401 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new visible chemical laser analogous to excimer lasers in lasing principle has been studied. Laser oscillation has been observed in the red spectral range. To our knowledge this is the first demonstration of chemical laser oscillation in the visible spectral range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101089
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  • 9
    Electronic Resource
    Electronic Resource
    Near-infrared emission in a chemically excited oxygen system (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 645-646 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Near-infrared emission has been observed in a chemically generated singlet oxygen system. Spectrum peaks observed at 1090, 1275, and 1550 nm appear to correspond to O2(1Δ)O2(3Σ) dimer transitions to ground state accompanied by vibrational changes. The experimental result suggests that the previously observed visible emission which accompanies the present infrared emission is also due to an excited oxygen dimer. The possibility of lasing at the infrared wavelengths is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103620
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  • 10
    Electronic Resource
    Electronic Resource
    New emission spectra from oxygen (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 2707-2708 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: New emission spectra have been observed from chemically produced excited oxygen. Evidence that the observed visible emission is due to oxygen dimer transitions is presented. Experimental results suggest that the observed oxygen dimer is stable O4 molecule rather than the usually observed Van der Waals-type dimolecular complex. The present system is discussed from the viewpoint of a new laser operating in the visible. The possibility of a similar oxygen-dimer laser operating in the near infrared is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101931
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