Showing papers by "University of Maribor published in 1978"
TL;DR: In this paper, a method for radiographic inspection with backscattered beta-rays using extended area beta-ray sources is briefly described, and various possible applications of the method are indicated.
5 citations
TL;DR: In this paper, the authors show that with an electrode separation of 10 mm and a wire temperature of 1500°C, a voltage of 70 kV on the cathode could be maintained.
1 citations
TL;DR: In this article, the authors derived the differential cross-section of the coherent neutron diffraction in the nematic phase, and showed that spontaneous distortions, which entered the theory through the intermolecular part of the structure factor and may be associated with two different diffusive optic soft modes of this phase, influence the neutron diffusion patterns through the correlations in space of the preferred molecular axes.
Abstract: The differential cross-section of the coherent neutron diffraction in the nematic phase is derived. It is shown that spontaneous distortions, which enter the theory through the intermolecular part of the structure factor and may be associated with two different diffusive optic soft modes of this phase, influence the neutron diffraction patterns through the correlations in space of the preferred molecular axes. The structure factor is anisotropic and exhibits for 1 A−1 < Q < 4 A−1 two distinct peaks depending on the relative orientation of the neutron scattering vector and the uniaxial nematic direction in quantitative agreement with the observations. For 0.4 A−1 < Q < 1 A−1 an intense peak is obtained in the calculations.
Der differentielle Wirkungsquerschnitt der koharenten Neutron enbeugungin der nematischen Phase wird abgeleitet. Es wird gezeigt, das spontane Verzerrungen, die in die Theorie durch den intermolekularen Teil des Strukturfaktors eingehen und mit zwei verschiedenen diffusen optischen “soft”-Moden dieser Phase verknupft sind, die Neutronenbeugungsdiagramme durch Korrelationen im Raum der bevorzugten Molekulachsen beeinflussen. Der Strukturfaktor ist anisotrop und zeigt fuur 1 A−1 < Q < 4 A−1 zwei unterschiedliche Maxima, die von der relativen Orientierung des Neutronenstreuvektors und der uniaxialen nematischen Richtung abhangen in quantitativer Ubereinstimmung mit den Beobachtungen. Fuur 0,4 A− < Q < 1 A−1 wird ein intensives Maximum in den Berechnungen erhalten.