Search Results - (Author, Cooperation:T. J. Parker)

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  1. 1
    Staff View
    Publication Date:
    2014-01-25
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Bacteria ; *Exobiology ; Extraterrestrial Environment/*chemistry ; Geologic Sediments ; Hydrogen-Ion Concentration ; *Mars ; Silicates/analysis/chemistry ; Spacecraft ; Sulfates/chemistry ; *Water
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2012-05-05
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Calcium Sulfate ; Extraterrestrial Environment ; Geological Phenomena ; *Mars ; Meteoroids ; Silicates ; Spacecraft ; *Water ; Zinc
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Publication Date:
    2015-10-10
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Climate ; Exhumation ; *Lakes ; *Mars ; Paleontology
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] Comprehensive analyses of remote sensing data during the three-year effort to select the Mars Exploration Rover landing sites at Gusev crater and at Meridiani Planum correctly predicted the atmospheric density profile during entry and descent and the safe and trafficable surfaces explored by the ...
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1038/nature03600

    Articles: DFG German National Licenses
  5. 5
    Burton, N. J. ; Parker, T. J.
    Springer
    Published 1984
    Staff View
    ISSN:
    1572-9559
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Conclusion In this paper we have demonstrated the performance of a simple hydraulically controlled moving mirror drive which is suitable for most applications in Fourier transform spectroscopy. The drive is constructed entirely of components which are available commercially, and the mirror movement is extremely smooth and free of systematic errors. The speed of travel can be controlled easily and continuously over a very wide range extending from 3×10−4 to 10mm/sec, and the system can be conveniently used in vacuum.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01010202

    Articles: DFG German National Licenses
  6. 6
    Staff View
    ISSN:
    1572-9559
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract We have used far-infrared oblique-incidence reflection spectroscopy to study bulk phonon polaritons, and attenuated total reflection (ATR) spectroscopy to study surface phonon polaritons, in long-period GaAs/AlxGa1−xAs and short-period GaAs/AlAs superlattices. Results on the former are in good agreement with an effective-medium bulk-slab model of the dielectric tensor of the superlattice; results on the latter are analysed in terms of a model that contains dielectric-tensor contributions from the confined optic phonons.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01008634

    Articles: DFG German National Licenses
  7. 7
    Staff View
    ISSN:
    1572-9559
    Keywords:
    far infrared ; DFTS ; optical constants ; cadmium mercury telluride ; phonon ; plasmon
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Far infrared phase and amplitude reflectivity measurements have been made on two bulk CdxHg1−xTe mixed crystals with composition x=0.29 and x=0.22 by dispersive Fourier transform spectroscopy (DFTS). The results have been used to calculate the real and imaginary parts of the dielectric function (ɛ′, ɛ″) from the Fresnel relations. A plasma contribution is observed in the spectra in addition to the phonon response. For both samples a broad but weak reflection band around 95–105 cm−1 is observed as well as the expected two-oscillator response from the HgTe-like and CdTe-like optical phonons. This feature is attributed to absorption due to phonon combination bands, but it is too broad to enable assignments to be made. There is no evidence of additional features in the CdTe region due to clustering.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02066636

    Articles: DFG German National Licenses
  8. 8
    Memon, A. ; Parker, T. J.
    Springer
    Published 1981
    Staff View
    ISSN:
    1572-9559
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The optical constants of KI have been determined in the far infrared at 200 and 300K by dispersive Fourier transform spectrometry and used to calculate the imaginary part of the anharmonic self-energy of the q≃o transverse optic mode. The overall agreement, both quãlitatively and quantitatively, with calculations by Berg and Bell and by Ełdridge and Kembry which include contributions from cubic anharmonicity is good.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01007280

    Articles: DFG German National Licenses
  9. 9
    Jamshidi, H. ; Parker, T. J.
    Springer
    Published 1983
    Staff View
    ISSN:
    1572-9559
    Keywords:
    far infrared ; optical constants ; dielectric parameters ; InP
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The amplitude and phase reflection spectra of InP have been determined in the far infrared at 6 and 300 K by dispersive Fourier transform spectroscopy and used to calculate values of the optical constants and dielectric functions in the region of the fundamental lattice resonance.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01009327

    Articles: DFG German National Licenses
  10. 10
    Mok, C. I. ; Burton, N. J. ; Parker, T. J.
    Springer
    Published 1982
    Staff View
    ISSN:
    1572-9559
    Keywords:
    Fourier spectrometer ; far infrared spectroscopy ; spectroscopic instrumentation ; computerized spectrometer ; solid state spectroscopy
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract A microcomputing system has been developed to provide on-line data acquisition and analysis for a Fourier transform spectrometer, and the interface between the spectrometer and the microcomputer is described in detail. The system has been equipped with software which includes a fast Fourier transform programme for use in either conventional or dispersive Fourier transform spectroscopy, and programmes for calculating the optical constants and dielectric functions of solids from complex spectra obtained by dispersive Fourier transform spectroscopy.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01006248

    Articles: DFG German National Licenses
  11. 11
    Jamshidi, H. ; Parker, T. J.
    Springer
    Published 1983
    Staff View
    ISSN:
    1572-9559
    Keywords:
    DFTS ; far infrared ; optical constants ; NaCl
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract A Fourier spectrometer has been developed for determining the optical constants of highly absorbing solids in the far infrared at temperatures down to 4.2K from measurements of their amplitude and phase reflection spectra. The spectrometer has been constructed almost entirely from commercially available components, and its performance is illustrated with measurements of the optical constants of NaCl at 6K.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01009403

    Articles: DFG German National Licenses
  12. 12
    Chambers, W. G. ; Costley, A. E. ; Parker, T. J.
    Springer
    Published 1988
    Staff View
    ISSN:
    1572-9559
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01010966

    Articles: DFG German National Licenses