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  • 1
    Digitale Medien
    Digitale Medien
    Structural analysis of ribosomal protein L7/L12 by the heterobifunctional cross-linker 4-(6-formyl-3-azidophenoxy)butyrimidate (1981)
    s.l. : American Chemical Society
    Biochemistry 20 (1981), S. 1020-1025 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00507a057
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  • 2
    Digitale Medien
    Digitale Medien
    Localization of virginiamycin S binding site on bacterial ribosome by fluorescence energy transfer (1986)
    s.l. : American Chemical Society
    Biochemistry 25 (1986), S. 3540-3547 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00360a011
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  • 3
    Digitale Medien
    Digitale Medien
    Light emission from CH and H sputtered from hydrogen-implanted graphite (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 2225-2226 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Characteristic spectra of light emission from CH molecules and hydrogen atoms sputtered from hydrogen-implanted graphite are observed. The relative intensities from both species vary with the implanted fluence. The CH yield remains constant while the Hα yield increases. This is consistent with two binding states of implanted hydrogen in graphite.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.99539
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  • 4
    Digitale Medien
    Digitale Medien
    Dynamic depth profile measurements of implanted deuterium in nickel (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1893-1897 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Depth profiles of 10-keV deuterium implanted in nickel were obtained during implantation through elastic recoil detection between 233 and 313 K. The profiles were allowed to reach saturation at each measured temperature. At the lowest temperature, measurements with various implantation fluxes were performed. Aside from surface peaks, the depth profiles show a uniform density of deuterium in the implanted layer and the shape of these profiles is independent of the sample temperature or implantation fluence or flux. The temperature and fluence dependence could be successfully reproduced with a trapping-detrapping model considering three different trap binding energies. Two of the model parameters are in good agreement with previous calculations performed to reproduce reemission measurements.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.342900
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  • 5
    Digitale Medien
    Digitale Medien
    On the growth of segregated C layers on top of Fe films on pyrolytic graphite samples during high-fluence D+ irradiation at elevated temperature (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 3400-3406 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: On Fe films evaporated on pyrolytic graphite, thick C layers segregate during high-temperature (above about 800 K) light ion irradiation if the penetrating ions are energetic enough to reach the Fe-graphite interface. The thickness of the C segregated layer and the C depth distribution in the Fe film have been determined with 2-MeV 4He+ Rutherford backscattering. A steady-state carbon overlayer is reached at high fluences (above about 1019 particles/cm2), the thickness of which depends on the energy of the irradiating beam for a given thickness of the Fe evaporated film. The anisotropic structure of the pyrolytic graphite substrate influences the thickness of the steady-state C overlayer, thicker C layers being measured for edge-oriented C substrates. Using the Monte Carlo code trim, the production of defects in the graphite substrate has been calculated for different thicknesses of the C overlayer. The total amount of defects produced in the graphite substrate has been identified as the parameter regulating the growth and the steady-state value of the C overlayer. With the depth distributions of defect production generated by trim as source functions, the diffusion of C interstitials in graphite under the influence of recombination with vacancies has been modeled. The segregating C fluxes are identified with the fluxes of interstitials arriving at the Fe/graphite substrate interface for a suitable choice of the parameters in the diffusion equation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.342656
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  • 6
    Digitale Medien
    Digitale Medien
    Modeling of hydrogen implantation into graphite (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 4860-4866 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A new theoretical framework has been developed which is applicable to the implantation and ion-induced release of hydrogen isotopes in graphite. It provides a physical basis and a refinement of the predictions of the simple model of local saturation and mixing. The model treats the trapping at defects and a local release of trapped atoms by nuclear knock-on. Ion deposition and damage functions are taken from trim simulations. The detrapped atoms may become retrapped or recombine to molecules, which then are transported to the surface by fast molecular diffusion, and subsequently released. By the choice of suitable rate constants in the model calculations, different experimental findings for the implantation and high-fluence self-reemission of deuterons in graphite may be explained consistently. Examples cover the saturation as a function of temperature and energy, depth profiles, gas reemission, thermal desorption, and effects of predamage.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.341234
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  • 7
    Digitale Medien
    Digitale Medien
    Ion-induced depletion of hydrogen from a soft carbonized layer (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 3833-3837 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Soft carbonized layers prepared in a glow discharge, with a hydrogen concentration of H:C∼4/3, are exposed to helium ion bombardment at energies between 0.3 and 2.6 MeV. A strong ion-induced depletion of up to 3×103 H atoms per incident 4He+ ion is observed by means of high-energy ion beam analysis. The hydrogen release is shown to be a local process, with the electronic energy deposition as the main responsible mechanism. The results are successfully compared to a model which takes into account local bond breaking and retrapping and the local formation of hydrogen molecules.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.343399
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  • 8
    Digitale Medien
    Digitale Medien
    Effect of Humidity on Properties of Plasticized Ethylcellulose (1947)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 39 (1947), S. 1149-1152 
    Details
    ISSN: 1520-5045
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ie50453a019
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  • 9
    Digitale Medien
    Digitale Medien
    Permeation of implanted deuterium through Ni near room temperature (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 2733-2738 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The permeation of 2–22-keV deuterons implanted into 25-μm-thick cold-rolled Ni foils was studied near room temperature. The results are generally characterized by a time lag τ and a steady-state permeation rate J. The variation of τ with beam intensity and temperature indicates an average relative concentration of ∼4×10−4 of saturable bulk traps of binding energy 0.26±0.01 eV, plus a larger concentration of weaker traps. At the highest energy, J is well described by theory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.335415
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  • 10
    Digitale Medien
    Digitale Medien
    Saturation and isotope mixing during low-temperature implantations of hydrogen into metals (1982)
    Springer
    Applied physics 27 (1982), S. 19-29 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 61.70.Tm ; 61.70.Wp ; 61.80.Jh.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Deuterons of 10 keV energy and protons with the same mean projected range have been implanted into several metals at a temperature of approximately 35 K and at dose rates of approximately 2 × 1014 cm−2 s−1. The amount of retained deuterium saturates at fluences larger than roughly 2 × 1018 cm−2. After implantation of deuterons and subsequent bombardment with protons, the deuteron depth profiles show characteristic double peak structures, which indicate a replacement process. The experimental data are in good agreement with a simple model of local saturation and mixing. The possible implications of this model are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01197542
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