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  • 1985-1989  (9)
  • 1955-1959
  • 1987  (9)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 37 (1987), S. 161-170 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Comet outburst activity and the structure of solar wind streams were compared on the basis of Pioneer 10, 11, Vela 3 and IMP 7, 8 measurements at the heliocentric distance r ≈ 1–6 AU. It is shown that the solar wind velocity waves which are evolving into corotating shock waves beyond the Earth orbit may be responsible for comet outburst activity. The correlation between variations of comet outburst activity with heliocentric distance and the behavior of the solar wind velocity waves is established. The closeness of the characteristic times for the velocity waves and comet outburst activity (7–8 days at r = 1 AU) as well as the simultaneous growth of both the characteristic times with r are noted. The observed distribution of the comet outburst activity parameters during the 11-year cycle is also in good agreement with the phase distributions during the 11-year cycle of variations of the coronal hole areas and the rate of change of the sunspot area δS p.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Initial measurements from the Giotto plasma instruments at the comet Halley bow shock have already been presented1'4 and some analysis has been done on the individual data sets5'8. Here we present the first comparative study at the bow shock using results from the Johnstone plasma analyser (JPA) ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 326 (1987), S. 1-6 
    ISSN: 1434-601X
    Keywords: 11.50.−w ; 21.10.Ky ; 25.20.−x
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Dispersive effects coming from pionic degrees of freedom (virtual magnetic pion photoproduction) are shown to reproduce the nucleonic magnetic susceptibility and to yield a parallel quenching in nuclei. The relative importance of low lying nuclear vs.Δ-excitations is discussed and the difference of their role for the magnetic and electric polarizability is pointed out.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1434-601X
    Keywords: 24.60.−k ; 25.30.Fj ; 27.80.+w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fine structure observed in high resolution inelastic electron scattering spectra for208Pb in the excitation energy range of the isoscalar giant quadrupole resonance has been analysed with a fluctuation analysis technique. The obtained density of levels as a function of excitation energyE x has then been used as a constraint for the shape and magnitude of the (radiative) background subtracted spectra subjected to a multipole decomposition. The derivedE2 strength in the region 8.0≦E x≦11.5 MeV exhausts (50 −7 +15 % of the energy weighted sum rule. TheE2 strength found is considerably larger than previously estimated from the same spectra and it is now both in shape and magnitude in good agreement with results from a recent208Pb(e, e′n) coincidence experiment.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 328 (1987), S. 463-466 
    ISSN: 1434-601X
    Keywords: 25.30. Dh ; 27.70.+q ; 21.60. Fw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on the search for mixed symmetricJ π=3+ states in the strongly deformed nucleus164Dy and present an upper limit for theM3 transition strength. From the excitation of the symmetric 3+ state at 828 keV we deduce theF-scalar magnetic octupoleg-factor.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 326 (1987), S. 447-454 
    ISSN: 1434-601X
    Keywords: 21.60.CS ; 25.30.Dh ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The line shape and the excitation strength of the very weak first excited J π =1/2+ state at Ex=1.684 MeV in Zeitschrift für Physik Zeitschrift für Physik9Be has been investigated with high-resolution inelastic electron scattering at E0=45 and 49 MeV and scattering angles θ=105°, 117°, 129° and 165°, and with high-resolution inelastic proton scattering at E0=13MeV and θ=15° and 18°. Due to lying just above the neutron threshold the level has a strongly asymmetric line shape which in both experiments can be described consistently with a Breit-Wigner expression modified on the low energy side by the threshold behaviour of the cross section. The resonance energy is ER=1.684 ± 0.007 MeV and the width T=217± 10 keV in thec.m. system. A single particle potential model calculation reproduces the line shape and the resonance parameters fairly well. In addition, the inelastic electron scattering form factor has been measured. In the range of momentum transfersq =0.24-0.46 fm−1 it is dominated by a 0p3/2→ 1s1/2 particle-hole transition. The transition is mainly longitudinal and of isoscalar nature with a strength of B (E1)↑ =0.027 + 0.002 e2 fm2, but a small M2 contribution ofB(M2)↑=8.8 ±1.5 μ N 2 fm2 has also been detected.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 811-816 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organic Electron Conductors and Precursors. V. Synthesis of Poly (organylthio-acetylenes)Poly(bis-organylthio-acetylenes) 2 and poly(mono-organylthio-acetylenes) 3 have been synthesized by complex catalyzed polymerization of the corresponding acetylenes (4 resp. 5). Yields and properties of the polymers 2, 3 depend on reaction conditions, the catalyst and the nature of the acetylenes. Relations between these influence factors are discussed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 220-223 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The fractions of the supermolecular structure with respect to a three-phase model were estimated by Raman spectroscopic investigations on different polyethylenes. The temperature dependence of the structure parameters is discussed. The results are compared with crystallinity values from desity, infrared, WAXS and NMR measurements.
    Notes: Für verschiedene Polyethylene werden ramanspektroskopisch die Anteile der übermolekularen Struktur nach einem Dreiphasenmodell bestimmt, und deren Temperaturabhängigkeit wird diskutiert. Die Ergebnisse werden mit Kristalliniatätswerten aus Dichte-, Infraot-, Röntgenweitwinkel- und NMR-Messungen verglichen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 579-581 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die von Strobl und Hagedorn angegebene Methode zur ramanspektroskopischen Charakterisierung der Polyethylenstruktur wurde auf gereckte Proben unterschiedlicher Trübung angewandt. Die Abhängigkeiten der Masseanteile der orthorhombisch-kristallinen, der amorphen und der Zwischenphase vom Reckverhältnis werden diskutiert.
    Notes: The method described by Strobl and Hagedorn for analysing the structure of polyethylene by means of Raman spectroscopy has been applied to drawn samples of different turbidity. The dependence of the mass fractions of the orthorhombic crystalline, the amorphous, and the intermediate phases on the draw ratio is discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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