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  • 1970-1974  (7)
  • 1965-1969  (29)
  • 1
    Electronic Resource
    Electronic Resource
    Rayleigh curve and coercive force of thin MnBi films (1973)
    Springer
    Applied physics 2 (1973), S. 137-142 
    Details
    ISSN: 1432-0630
    Keywords: Thin MnBi films ; Coercive force ; Rayleigh curve
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Statistical Rayleigh-curve theory is applied to thin evaporated MnBi films in order to obtain information concerning the density of wall pinning centra. The treatment results in a prediction of the coercive forceH c and the average distance between adjacent wall pinning centra, 2L 0. The coercive forceH cis also measured experimentally. The results of the two methods are in good agreement with each other. The influence of dislocations on the coercive force is discussed briefly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00883975
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  • 2
    Electronic Resource
    Electronic Resource
    Absolutmessung einiger Argon-II-Übergangswahrscheinlichkeiten (1967)
    Springer
    The European physical journal 206 (1967), S. 184-188 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some Ar II transition probabilities were measured absolutely using a tungsten ribbon lamp as a calibration standard. The plasma was produced by a conical Theta-pinch. Gas mixtures of H∶Ar and He∶Ar were used to exclude inhomogeneity of the layer as a possible source of error. Electron densities and temperatures were determined by measuring Hydrogen and Helium line profiles respectively, and line to continuum intensity ratios. The measured values can be compared with results of earlier experiments and with newer theoretical calculations. The agreement between the results of this experiment and the theoretical values is satisfactory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01325926
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  • 3
    Electronic Resource
    Electronic Resource
    Starkeffekt an Linien des einfach ionisierten Stickstoffs (1967)
    Springer
    The European physical journal 206 (1967), S. 309-318 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A homogeneous and thermal plasma was produced by a modified T-tube. In a shot to shot analysis the lines of several multiplets of singly ionized Nitrogen were investigated as to their Starkeffect. Densities were determined by comparing the measured halfwidths of some neutral Helium-lines with the well established theory of Starkbroadening of these lines. The temperature followed from the relative intensities of the measured Helium- and Nitrogenlines assuming partial thermal equilibrium. The results of this experiment deviate from previous measurements ofDay et al. as well as from the theory of Starkbroadening in isolated lines of the heavier elements byGriem. It is shown (1) that the broadening in N II is a rough factor of two larger than theoretically expected, (2) that linebroadening in N II is proportional to the density, (3) that the Stark broadened lines follow dispersion profiles to the distance of several halfwidths from the line center.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326112
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  • 4
    Electronic Resource
    Electronic Resource
    Über die Gleichgewichtsbesetzung der Zustände von O II (1967)
    Springer
    The European physical journal 207 (1967), S. 404-410 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Experimental results concerning the density-dependent relative populations of two energetically different states of the singly ionized Oxygenatom are compared to theory. Opposed to the latter, the experiment gave relative populations consistent with the thermodynamic equilibrium assumption down to electron densities of 1016(cm−3). The plasma was produced by a modifiedT-tube and the measured effect may be a peculiarity of the particular plasma investigated. The conclusion may be drawn that the plasma radiates in thermal equilibrium at much lower densities than theoretically expected. If a theoretical estimate ofGriem may be assumed formally correct, a correction factor of the order of ten can be applied. This granted, even the states of doubly ionized species may be assumed to be populated as in thermal equilibrium at densities exceeding 1017(cm−3).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326352
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  • 5
    Electronic Resource
    Electronic Resource
    Photodynamische Wirkung auf das solide Ehrlich-Karzinom (1966)
    Springer
    Naturwissenschaften 53 (1966), S. 481-482 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00601763
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  • 6
    Electronic Resource
    Electronic Resource
    Plasmaeffekte an einer ionisierten Heliumlinie (1966)
    Springer
    The European physical journal 191 (1966), S. 503-507 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract According to two different theories the 4686å-line of ionized Helium should be blue-shifted by measurable amounts. In the attempt of a precision measurement of the effect under several different plasma conditions no displacement could be found within the experimental accuracy of ±0.3å. A previous measurement is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326827
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  • 7
    Electronic Resource
    Electronic Resource
    Absolute Übergangswahrscheinlichkeiten höherer Ionen (1967)
    Springer
    The European physical journal 199 (1967), S. 445-455 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that by solely measuring intensities without explicit knowledge of the plasmatemperature or density absolute transition probabilities in the higher ions can be obtained. To do this one procures a mixture of Helium with the testgas and uses Helium as the “thermometergas” by determining the relative intensities of chosen He I and He II transitions. This measurement, however, is not used to determine an actual temperature but rather to deduce directly the relative populations in the test-gas-ions. This becomes possible if for certain levels a combination of ionization- and exitation potentials results in the same value for Helium and the testgas. An experimental test has been performed with Oxygen as an example and absolute O III-oszillator strength are quoted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01332293
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  • 8
    Electronic Resource
    Electronic Resource
    Stark-effect calculations in the second Lyman-series of ionized helium (1970)
    Springer
    The European physical journal 239 (1970), S. 322-330 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The profiles of some lines of the second Lyman-series of HeII, broadened by microscopic Starkeffect in plasmas of given temperatures and densities were calculated and compared to available experimental data. The comparison yielded reasonable agreement as to the resulting halfwidths and lesser agreement in details of the line-centers and -wings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01398242
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  • 9
    Electronic Resource
    Electronic Resource
    Über Ordnungszustände in synthetischen Fasern und einige Zusammenhänge mit ihren Eigenschaften (1966)
    Springer
    Colloid & polymer science 210 (1966), S. 64-78 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Die Eigenschaften synthetischer Fasern hängen von ihrer Molekül- und Faserstruktur ab. Moleküllänge, Moleküllängenverteilung, die Statistik der Anordnung von Monomeren bei der Copolymerisation und die Steifheit des Moleküles sowie die Beweglichkeit von Molekülteilen im festen Zustand beeinflussen die Orientierbarkeit und die Kristallisation der Fasern und damit vor allem die mechanischen Eigenschaften und das thermische Umwandlungsverhalten. Im Anschluß an eine Darstellung der Fasermodelle wird eine Reihe von Fragen zur Veränderung der Faserstruktur bei der Faser-Herstellung, -Verarbeitung und bei ihrem Gebrauch diskutiert. Einige Beispiele zeigen, daß jede meßbare Fasereigenschaft von einer ganzen Reihe von Strukturparametern abhängt, bzw. daß jeder Strukturparameter eine Reihe von Fasereigenschaften bestimmt. Dabei gehen die Strukturparameter mit unterschiedlichem Gewicht und abhängig vom Wege, auf dem sie erreicht werden, in die Fasereigenschaften ein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01500436
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  • 10
    Electronic Resource
    Electronic Resource
    Absolute Übergangswahrscheinlichkeiten einiger N III-Linien (1969)
    Springer
    The European physical journal 222 (1969), S. 180-190 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The intensities of the stronger N III-transitions in the visible range of the spectrum are determined by an experimental method, insensitive to the precise knowledge of the temperature, density, and chemical composition of the plasma. By linking to known N II-values absolute N III transition probabilities are obtained. In the comparison of the two spectra LTE-relations may be used due to the opacity of the plasma in the resonance transitions of N III. The experiment is carried out in a modifiedT-tube as well as in a longer duration high current discharge and also by the photoelectric as well as by the photographic method of detection. The fair agreement of the results obtained with varied apparatus and measuring methods adds to the reliability of the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01392295
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