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  • 11
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 1177-1179 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The refractive index n, extinction coefficient k, and optical band gap Eopt of nitrogen incorporated amorphous carbon films α-C:N have been investigated by spectroscopic ellipsometry. The effect of the incorporated nitrogen on the bonding configuration of carbon atoms has been discussed in term of the optical behavior of the films. The results show that nitrogen incorporation into the films stabilizes the tetrahedral bonds of carbon atoms, resulting in lower values of both n and k. However, if the nitrogen incorporation is accomplished by means of excessive N+ ion bombardment, the formed α-C:N films possess zero gap and are more "graphitelike.'' © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 43 (1981), S. 443-453 
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 9 (1990), S. 972-974 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 21 (1986), S. 1-25 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The optical properties of the dielectric oxide films SiO2, Al2O3, TiO2, ZrO2, CeO2 and Ta2O5 produced by ion-based techniques have been reviewed. The influence of ion bombardment during deposition is discussed in some detail and the various production techniques are described. Recent results on the deposition and properties of diamond-like carbon films are also reviewed. Finally, some examples of the practical applications of high quality dielectric oxide films are given.
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  • 15
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Zirconia films were deposited in vacuum from an electron-beam hearth with simultaneous ion bombardment from a Kaufman source. The effects of argon, oxygen and nitrogen ions were investigated, together with those of temperature and substrate type. For amorphous substrates, without ions, X-ray and electron diffraction showed that amorphous films were produced at room temperature. Deposition on to 300°C amorphous substrates produced the monoclinic form. Ion assistance converted the structure to cubic. It was found that deposition on to KCI (100) substrates also produced the cubic form at elevated temperatures, with or without ions. High-resolution microscopy showed that these films were crystallographically oriented with either 〈100〉 or 〈110〉 normal to the KCI substrate. The Raman spectra of films on fused silica substrates were correlated with the X-ray diffraction scans and the conditions under which the Raman spectrum could be used as a reliable indicator of microstructure were found.
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 54 (1995), S. 833-836 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 17
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract He and Ne have been bombarded with singly charged ions of elements from carbon to magnesium, in the energy range 10–75 keV, and photons emitted from the target atoms have been detected. The results are discussed in terms of molecular orbital level correlation diagrams in which account has been taken of conservation of the total electronic spin. Comparisons are drawn with inner shell excitations and electronic stopping power measurements.
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  • 18
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The differential cross section for the processK(42 S)+N2, CO→K(42 P)+ N2, CO is presented for reduced scattering angles τ〈2·104 eV deg. The inelastic process is identified by determining the time-correlation between the inelastically scattered potassium atom and the emittedK(42 P→42 S)photon. The performance of different coincidence techniques is compared. From the differential cross sections values for the position of the curve crossing responsible for the excitation process are derived (R c=2.77, 2.48 Å andV(R c )=0.55, 1.00 eV for K-N2, CO respectively). The values indicate that the lowest ionic intermediate state of the form K+-N 2 − , CO− is responsible for the excitation process.
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 16 (1978), S. 271-278 
    ISSN: 1432-0630
    Keywords: 79.20 ; 61.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract As a continuation of earlier sputtering yield measurements in an ion microprobe, the influence of oxygen and nitrogen on sputtering yield, ionisation efficiency and depth resolutions has been studied. For inert gas bombardment the yield of Ti and V falls sharply at a certain oxygen exposure. While this decrease in yield can be correlated with an increase in surface binding energy in the case of titanium, cone formation causes the yield to drop for oxygen exposed vanadium. In contrast, during nitrogen bombardment the only effect of oxygen exposure is a drastic increase of the ionisation efficiency; the sputtering yield or the depth resolution Δz/z is hardly influenced by oxygen coverage. As was observed earlier in the case of Cu−Ni layers, Δz is essentially constant for erosion depthsz≳800 Å, thus yielding better resolution at large depths than is to beexpected from a sequential layer removal model. The extent of the transition zone Δz, is determined by surface topography and thus depends on the target composition as well as its structure.
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  • 20
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The linear and circular polarisations of theK(42 P→42 S) transition detected in delayed coincidence with the inelastically scattered potassium atom are presented forK- He, Ne, Ar, Kr and Xe. For all systems the Stokes vector measurements have been performed as a function of the potassium scattering angle at a beam energy of 103 eV. The coherence properties of the excitation process are studied with the help of the measured degree of polarisation. For He, Ne and Xe the excitation amplitudes (e.g. the parametersλ andχ) are deduced from the measured Stokes vector. For Ar and Kr the collisionally excited state is not a pure state, and it is concluded that both single excitation of theK atom and simultaneous excitation of both collision partners contribute toK(42 P) excitation. The results are compared with the predictions of the semiclassical treatment of the excitation process.
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