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  • 1990-1994  (4)
  • 1994  (1)
  • 1992  (3)
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  • 1990-1994  (4)
Year
  • 1994  (1)
  • 1992  (3)
  • 1991  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Departures from the principle of superposition in silicon solar cells (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7920-7930 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The principle of superposition forms the theoretical basis on which the comparison of illuminated and dark current-voltage (I-V) characteristics of solar cells depends. Two cases predicted from computer simulations where the superposition principle does not apply in silicon p-n junction solar cells are reported. These predictions are confirmed experimentally with measurements taken on existing high-efficiency devices, and cannot be accurately described by previous explanations for departures from this principle. The first case, which is the more important in terms of operation under 1 sun illumination, occurs in cells where recombination via defect levels (Shockley–Read–Hall recombination) with unequal electron and hole capture rates dominates the I-V characteristics. The second case is evident at small forward voltages in almost all silicon solar cells. It is shown that the former is due to a saturation in the recombination rate, while the latter is the result of a bias-dependent modification of the carrier concentrations across the p-n junction depletion region which is different under illumination from that in the dark. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357902
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Type IV laryngotracheoesophageal cleft in a neonate (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Pediatric anesthesia 2 (1992), S. 0 
    Details
    ISSN: 1460-9592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The peri-operative management of a neonate with type IV laryngotracheoesophageal cleft, microgastria and pulmonary hypoplasia is described. Bronchoscopy was necessary to delineate the extent of the defect and was useful for performing selective endobronchial intubation. Chronic aspiration and atelectasis complicated the post-operative management. Endobronchial intubation is compared with the use of a double lumen tube and tracheostomy for intra-operative ventilation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-9592.1992.tb00483.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Levels of138Xe populated in the β-decay of138I (1992)
    Springer
    The European physical journal 344 (1992), S. 35-39 
    Details
    ISSN: 1434-601X
    Keywords: 27.60 ; 21.10 ; 23.20.C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The level scheme of138Xe has been elucidated byγ-γ directional correlations and coincidences followingβ-decay of138I. The138I was produced by the neutron induced fission of235U, in the online thermal fissionproduct mass-separator, OSTIS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291017
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Excited level lifetime measurements following very low energy nuclear recoils (1992)
    Springer
    Hyperfine interactions 75 (1992), S. 533-542 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using high resolution gamma spectroscopy it is possible to observe Doppler broadening of gamma transitions from excited states which have themselves been populated after emission of gamma photons or other low energy nuclear radiation. This allows the determination of the lifetimes of these intermediate states, providing the time dependence of the recoil velocities is known. Conversely, if the lifetime is well known, this technique may be used to study the recoil process itself (and hence the atomic interaction) at energies of only a few times the lattice binding energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399009
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    Paper (German National Licenses)
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