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  • 1
    Electronic Resource
    Electronic Resource
    Ab initio structure of 3p4p in Si I (1992)
    Springer
    The European physical journal 23 (1992), S. 3-6 
    Details
    ISSN: 1434-6079
    Keywords: 31.10 ; 31.20.D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Multiconfiguration calculations have been performed in order to estimate ab initio energies for the configuration 3p4p in Si I. A preliminary attempt has also been made to calculate E2 transition rates for transitions from levels of 3p 2 to those of 3p4p. However, these rates show a gauge dependence, which indicates that further correlation needs to be included to obtain accurate rates and lifetimes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436695
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Electric quadrupole transition rates for even parity levels of Si I (1991)
    Springer
    The European physical journal 21 (1991), S. 7-10 
    Details
    ISSN: 1434-6079
    Keywords: 31.10 ; 31.20 ; 32.80K
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Non-relativistic Hartree-Fock radial wavefunctions have been used to provide ab initio estimates of E2 transition rates from levels of the 3p 2 configuration to those of the 3p4f configuration in Si I. Where it is possible to make comparison with experimental data the results are in reasonable qualitative accord with recent multiphoton ionization observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01426611
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    Paper (German National Licenses)
    Fulltext
  • 3
    facet.materialart.
    Unknown
    Simplified systematic production of graphite/polymide prepreg (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Systematic method of producing preimpregnated polymide/graphite material is ideally suited for researchers and small lot producers of composite structures.
    Keywords: MATERIALS
    Type: LAR-12266 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    Nondestructive spot tests allow rapid identification of metals (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Ordered qualitative test sequence, presented in flow chart form, permits identification of all common metallurgical elements and many high-temperature, stainless, high and low carbon, and tool steels within about 30 minutes. Identification is made from colors or specific reactions produced by the addition of standard chemical reagents.
    Keywords: MATERIALS
    Type: LAR-10539
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Flexural Properties of Aramid-Reinforced Pultrusions (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Four resin systems show improved properties after postcuring. Comparison of flexural properties made of pultrusions reinforced by Kevlar (or equivalent) aromatic polyamide and having constant fiber volume and varied matrices, pretreatments, and postcures. Objective of study to improve flexural properties of pultrusion reinforced with Kevlar (or equivalent). Advantages of using pultrusion process, over conventional hand-layup methods included higher production rates, low facility and labor requirements, and reduced manufacturing costs of advanced composites.
    Keywords: MATERIALS
    Type: LAR-13442 , NASA Tech Briefs (ISSN 0145-319X); 11; 2; P. 46
    Format: text
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    NASA TECHNICAL REPORTS
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