Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Dependence of the optical properties of p-CdTe and p-Cd0.96Zn0.04Te on the bromine concentration in a bromine-methanol etching solution (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 4074-4076 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Photoluminescence measurements were carried out to investigate the dependence of the optical properties of p-CdTe and p-Cd0.96Zn0.04Te on various relative concentrations of bromine in a mixture of methanol and bromine. As the bromine concentration increased, the intensity of the luminescence increased; additionally, an exciton bound to a neutral acceptor (A°X) peak at 1.588 eV in p-CdTe was resolved into an exciton bound to neutral donor (D°X) peak at 1.592 eV and an A°X peak. The mixed bands of the 1.574 and 1.546 eV peaks were well resolved by using an etching bromine concentration of 2%; in particular, the intensities of the D°X and 1.574 eV peaks increased as much as five and seven times, respectively. The intensity of the peak at 1.48 eV related to defects also increased. The intensity of A°X at 1.609 eV in p-Cd0.96Zn0.04Te changed slightly with the bromine concentration. The intensities of the luminescence peaks due to the recombination of the electrons in conduction band with acceptors and to the defect relation did not vary. These results indicated that the number of Cd vacancies could be reduced due to the addition of Zn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352832
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Azimuthally symmetric pseudosurface and helicon wave propagation in an inductively coupled plasma at low magnetic field (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 3135-3142 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The mode transition from a capacitively coupled mode (E mode) to an inductively coupled mode (H mode) was observed in an inductive Ar plasma source by applying an axially uniform low B field. The applied fundamental rf was 13.56 MHz and many harmonic components were observed. A beat and standing wave patterns of azimuthally symmetric (m=0 mode) first and second harmonic pseudosurfaces and helicon waves were measured at various densities (n∼9.0×1010–2.2×1011 cm−3) and B fields (12–28 G). Wave propagation mode changes, from pseudosurface to helicon waves and from helicon to pseudosurface waves, were observed at critical conditions, ωc/ω〉3.0 and n∼2.2×1011 cm−3. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873040
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Magnetic and collisional effects on presheaths (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 3222-3233 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of both magnetic field and collisions on presheath properties are experimentally investigated in plasmas with electron temperatures much greater than ion temperatures. Measurements of plasma potential in collisionless plasmas show presheath thicknesses at boundaries oblique to magnetic field to be approximately (Cs/ωci)sin ψ, where Cs is the ion sound speed, ωci is the ion gyrofrequency, and Ψ is the angle between the magnetic field and the normal to the wall boundary. Measurements of plasma potential in collisional plasmas find presheaths consisting of two distinctive regions. With ion–neutral collision mean-free path λn〈(Cs/ωci)sin ψ, the presheath region next to the sheath has collisional characteristics and a thickness of approximately (0.5–0.6)λn. The corresponding presheath region adjacent to the bulk plasma has magnetic characteristics and a thickness of approximately (0.5–0.9)(Cs/ωci)sin ψ. Equipotential contours in the collisional region of this presheath are found to be parallel to the boundary, while those in the magnetic region are not. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871153
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effect of harmonic rf fields on the emissive probe characteristics (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 403-405 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: New features of the emissive probe characteristic curves in an inductive plasma source were observed in the E mode operation. More than the two inflection points in the derivative of the I–V characteristic curves are found when the harmonics of the input frequency (13.56 MHz) are present. The pairs of inflection points are symmetric about dc plasma potential. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1150214
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    A two-dimensional particle-in-cell simulation of an electron-cyclotron-resonance etching tool (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 2270-2278 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A particle-in-cell (PIC) simulation of an axisymmetric electron-cyclotron-resonance (ECR) etching tool is developed in which up to 2×106 particles per species are loaded in a two-dimensional spatial computational mesh (r,z), along with three velocity components (vr,vθ,vz). An ECR heating scheme based on single-particle trajectories in the resonance zone generates the simulated plasma. Electron- and ion-neutral elastic and inelastic collisions are treated by a null Monte Carlo collision method. The code generates the electron and ion-velocity distributions, plasma potentials, and densities in a CF+3/CF4 etching plasma. In addition, a novel scaling technique which bridges the gap between the ion and electron-time scales and accelerates the rate of convergence of the code is introduced for a PIC code. The predictions of the code show that microwaves are completely absorbed before reaching the exact location of resonance. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360144
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Modification of InAs quantum dot structure by the growth of the capping layer (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 49-51 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: InAs quantum dots inserted at the middle of a GaAs quantum well structure have been investigated by transmission electron microscopy and scanning transmission electron microscopy. We find that the growth condition of the overlayer on the InAs dots can lead to drastic changes in the structure of the dots. We attribute the changes to a combination of factors such as preferential growth of the overlayer above the wetting layers because of the strained surfaces and to the thermal instability of the InAs dots at elevated temperature. The result suggests that controlled sublimation, through suitable manipulation of the overlayer growth conditions, can be an effective tool to improve the structure of the self-organized quantum dots and can help tailor their physical properties to any specific requirements of the device applications. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.121719
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Direct measurement of plasma flow velocity using a Langmuir probe (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 481-486 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Plasma flow velocity was determined experimentally from the time delay between fluctuations measured by two spatially separated Langmuir probes in both subsonic and supersonic, steady-state, unmagnetized plasma flows.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144471
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Transport properties of two-dimensional electron gases containing InAs self-assembled dots (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 2468-2470 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a study of the transport properties of two-dimensional electron gases formed in GaAs/AlGaAs heterostructures in which InAs self-assembled quantum dots have been inserted in the center of a GaAs quantum well. We observed that, while maintaining a constant carrier density, the mobility increased as the InAs dot density was reduced. The ratio of the transport to the quantum lifetime was measured to be approximately five with the dominant scattering mechanism attributed to short-range scattering from the inserted InAs dots. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.122484
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Vibrational relaxation in the 3B1 state of SO2 (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 1665-1672 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The vibrational relaxation rate constants of the four low-lying vibrational levels in the 3B1 state of the SO2 molecule have been investigated by a laser induced phosphorescence method in pure SO2. The relaxation rate constants for the 3B1(0,1,0) level have also been studied in Ar, O2, N2, and CO2. The low-lying vibrational levels of the 3B1 state are populated from ground state SO2(X 1A1) by direct pumping, and the phosphorescence emissions from the laser excited as well as the collisional product levels are monitored. The state-to-state relaxation rate constants for the upper two levels are assigned by the kinetic simulations of the phosphorescence time profiles observed from each level. The magnitudes of the relaxation rate constants are in the range of 2.3–3.0×10−11 cm3 molecule−1 s−1 in SO2 and 0.26–1.3×10−11 cm3 molecule−1 s−1 in other gases. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468898
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Quantitative analysis method for the vapor phase concentration (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 1930-1933 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In order to understand fuel vaporization and fuel–air mixing phenomena, methods for determining the concentration of fuel vapor and liquid are necessary. Previously, the vapor phase concentration was normally calculated from the absorption measurement. However, the absorption coefficient of vapor is a characteristic of the solute and depends on the wavelength of the excitation light, the solvent, and the temperature. Therefore it may require that each parameter be correctly determined, and the overall accuracy depends on the accuracy of separate parameters. In this study a direct measurement of the vapor pressure and temperature was conducted and those results were compared with the results from the absorption measurement. The method used in the direct pressure measurement is much closer to an estimate based on the Clausius–Clapeyron equation. Based on this argument, it is believed that the direct pressure measurement method is preferred for accurate measurement of the vapor phase concentration to apply to the quantitative analysis in fuel spray study. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1453502
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...