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  • 1
    Electronic Resource
    Electronic Resource
    Reflection absorption infrared spectroscopy at the Daresbury SRS : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1547-1550 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The high brilliance of modern synchrotron radiation sources results in a significant intensity advantage over conventional sources in the far infrared region of the spectrum. For applications with inherently low étendue, such as reflection absorption infrared spectroscopy (RAIRS) of surfaces, this advantage extends into the mid-infrared (IR) region, to 1000 cm−1 or higher. The spectroscopic region between 100 and 1000 cm−1 is of particular interest in surface science since it includes the vibrational modes of the majority of direct bonds between the surface and adsorbate, but the low intensity of conventional sources renders investigations of this region difficult. In this paper, we discuss the design criteria of the new Daresbury infrared beamline.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143807
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Low-damage processing of CdTe(110) surfaces using atomic hydrogen (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 55-57 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present the results of an AES, XPS, and LEED study of the reaction of oxide and contaminant overlayers on the CdTe(110) surface with atomic hydrogen. Exposure of an oxidized surface to a flux of atomic hydrogen produced by "cracking'' ambient molecular hydrogen on a hot tungsten filament results in a rapid, quantitative removal of the oxide overlayer with substrate temperatures as low as 300 K to produce a stoichiometric surface free of contaminants which has sufficient surface order to produce a sharp (1×1) LEED pattern. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115491
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  • 3
    Electronic Resource
    Electronic Resource
    Photochemistry of dimethylcadmium on compound semiconductor surfaces (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 6552-6563 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We present dynamical studies of the surface photochemistry of dimethylcadmium (DMCd) adsorbed on GaAs(110) and CdTe(110) surfaces. This important precursor for chemical vapor deposition is studied using time-of-flight (TOF) spectroscopy in conjunction with temperature programmed desorption (TPD). For the case of greater than one monolayer coverages, on these surfaces, both photofragmentation and photodesorption are observed following irradiation. The relative probabilities of these two processes are found to be strongly dependent on adsorbate coverage and incident photon energy. Direct photoabsorption by the adsorbed molecule is found to dominate the photofragmentation process, with the substrate strongly reducing the probability of photofragmentation at low coverages due to the operation of substrate mediated channels for excited state relaxation. The CH3 fragments observed following photodissociation are found to have kinetic energies that are invariant with the energy of the exciting photon (193 and 248 nm), an effect attributed to an efficient curve crossing between excited states in this molecule. The molecular desorption process is found to exhibit an unusual coverage dependence which is linked to the probability of deposition of a significant amount of vibrational excitation in the overlayer via substrate mediated de-excitation processes. Following the adsorption of one monolayer on the GaAs substrate, the photochemistry observed is significantly different due to the thermal dissociation of DMCd to form adsorbed methylgallium moieties. In this case, multiple features are observed in the TOF spectrum with kinetic energies significantly different to those observed for the gas phase or physisorbed molecule. Correlation of the TOF spectral features with thermal desorption data allows these TOF features to be assigned to specific adsorbed intermediates. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.473655
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  • 4
    Electronic Resource
    Electronic Resource
    Catvlliana (1913)
    Cambridge : Cambridge University Press
    The @classical quarterly 7 (1913), S. 122-128 
    Details
    ISSN: 0009-8388
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Notes: THE clue to the meaning and interpretation of this poem, which has long been the despair of critics, is, I believe, to be found in a variant on line 9, faithfully preserved in the Codex Sangermanensis (G) and yet unaccountably neglected hitherto. G's text I transcribe from M. Chatelain's photo-lithograph facsimile of the manuscript (Leroux, Paris, 1890).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0009838800023983
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  • 5
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    Conjectural Emendations in the Silvae of Statius (1906)
    London : Periodicals Archive Online (PAO)
    The Journal of philology. 30:59 (1906) 133 
    Details
    ISSN: 1751-8490
    Topics: Linguistics and Literary Studies
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:0098-1907-030-00-000005
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