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  • 1985-1989  (7)
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Material
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Year
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  • 1
    Electronic Resource
    Electronic Resource
    What war injuries may teach the peace time surgeon (1988)
    Springer
    Langenbeck's archives of surgery 373 (1988), S. 63-72 
    Details
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01262766
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Vibrationally inelastic scattering of H∼ ions from H2, N2, O2 and CO2 (1985)
    Springer
    The European physical journal 320 (1985), S. 95-104 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract State-resolved measurements are presented for vibrational excitation of H2, N2, O2 and CO2 by H− impact in the collision energy rangeE cm=20–180 eV and for scattering in the forward direction (0±0.5°). The data obtained from the measurements are the relative intensities and differential cross sections for vibrational excitation up toν′=4, the transition probabilitiesP 0→ν′ and the vibrational energy transferΔE vib. For the systems H−-H2, N2, O2 the vibrational inelasticity increases in the order H2-N2-O2. The mechanism for vibrational excitation in these systems is due to transient charge transfer from the H− ion into antibonding orbitals of the target molecule which provides a bond stretching force during the collision. For H2 and N2, the results are compared with corresponding measurements for H+ scattering where the interaction mechanism is quite different. In the case of CO2, vibrational excitation in forward scattering is caused primarily by the long-range dipole interaction. The spectra are very similar for H−-CO2 and H+-CO2. Finer details are attributed to the influence of transient charge transfer and valence interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411930
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Aspekte der Chirurgie seit 1945 (1986)
    Springer
    Langenbeck's archives of surgery 368 (1986), S. 81-96 
    Details
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01273847
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Crossed beam study of He+-O2 charge transfer reactions in the collision energy range 0.5–200 eV (1986)
    Springer
    The European physical journal 1 (1986), S. 303-320 
    Details
    ISSN: 1434-6079
    Keywords: 34.50 ; 34.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Energy spectra and angular distributions of the O+ and O 2 + product ions resulting from the He+-O2 charge transfer reaction have been measured in the collision energy range 0.5–200 eV using the crossed-beam method. The O 2 + ions represent only a minor fraction of the reaction products (0.2–0.6% over the energy range measured). In the dissociative charge transfer reaction, four main processes are identified leading to O+O+ reaction products in different electronic states. Two different mechanisms can be distinguished, each being responsible for two of the observed processes:(i) a long-distance energy-resonant charge transfer process involving thec 4∑ u − (v′=0) state of O 2 + and(ii) a slightly exothermic charge transfer process via the (III)2∏ u state of O 2 + (with the exothermicity depending on the collision energy). Angle-integrated branching ratios and partial cross sections (in absolute units) have been determined. The branching ratios of the individual processes show a pronounced dependence on the collision energy. At low energies, the O+ product ions are preferentially formed in the2 P 0 and2 D 0 excited states. The angular distributions of the O+ product ions show an anisotropic behaviour indicating an orientation-dependent charge transfer probability in the He+ −O2 reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436687
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Photofragment spectroscopy of molecular ions: design and performance of a new apparatus using coaxial beams (1988)
    Springer
    The European physical journal 8 (1988), S. 371-378 
    Details
    ISSN: 1434-6079
    Keywords: 33.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new apparatus is described for the study of photofragment spectroscopy of molecular ions in a coaxial laser-ion beam configuration. Complementary to other developments in this field, the apparatus emphasizes the kinetic energy spectroscopy of the photofragments and is particularly designed to study direct photodissociation processes via repulsive potential curves. On the laser side, the experiment uses discrete lines in the visible and UV region (Ar+ laser, excimer laser). A detailed analysis of the experimental conditions is presented, in particular with respect to the attainable energy resolution in the photofragment spectra. The apparatus provides sufficiently intense ion beams (5–10 nA) with controlled energy resolution (ΔE = 100−500 meV) and angular collimation (ΔΘ = 5−10 mrad). The measured photofragment spectra of H 2 + in the visible and UV region are in full accordance with the predictions of the design analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437104
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Measurements of differential cross sections fore-Ar, Kr, Xe scattering atE = 0.05 − 2 eV (1988)
    Springer
    The European physical journal 7 (1988), S. 333-347 
    Details
    ISSN: 1434-6079
    Keywords: 34.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Differential scattering experiments have been performed for the systemse-Ar, Kr, Xe in the energy rangeE=0.05 − 2 eV and the angular range ϑ=20–100° using a crossed-beam arrangement. The measurements cover the region of the Ramsauer-Townsend minimum (for the first time in differential scattering using modern techniques) and show the drastic variation of the cross section over this energy range. For these experiments, a new electron spectrometer has been developed which is especially designed to allow measurements at very low collision energies under well controlled conditions. In the present work, the measurements could be extended down to 50 meV. The energy resolution was ΔE = 10 meV (FWHM). Absolute cross sections and the correct transmission properties of the systems are determined usinge-He scattering as a reference system. The experimental data are analysed by the MERT method which allows to extrapolate the cross sections to zero energy. On the basis of the MERT parameters, detailed comparison is made with other work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439803
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Direct photodissociation of SO+ via the 14Σ+ state (1989)
    Springer
    The European physical journal 13 (1989), S. 147-151 
    Details
    ISSN: 1434-6079
    Keywords: 33.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The direct photodissociation process SO+ a 4Π +hv → S+ (4S0) + O(3P) via the repulsive SO+ 14Σ+ state has been studied using a laser-ion photofragment spectrometer with coaxial beams. The kinetic energy distribution of the S+ photofragments has been measured at a laser wavelength of λ=488 nm (hv=2.54 eV). The spectrum shows vibrational structure which can be assigned to transitions from the vibrational levelsv = 7–13 of the initiala 4Π state. The experimental data are used along with semi-empirical calculations to locate the potential curve of the repulsive 14Σ+ state in the Franck-Condon region. The results are compared with data obtained from photopredissociation studies of SO+ and with theoretical calculations for the 14Σ+ state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01398584
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    Paper (German National Licenses)
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