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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica 29 (1978), S. 7-20 
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Für das Studium der perfekten und der imperfekten Drehdisklinationen werden die Methoden der Differentialgeometrie herangezogen. Es wird gezeigt, daß diese Disklinationen als Endpunkte für ein ebenes Kreuzgitter von schraubenförmigen Versetzungen wirken. Im Falle imperfekter Disklinationen ist diese Wand auch eine Korngrenze. Weiters ist ein Drehdisklinationsdipol ähnlich einer endlichen Wand paralleler schraubenförmiger Versetzungen.
    Notes: Summary The techniques of differential geometry have been applied to the study of both perfect and imperfect twist disclinations in simple cubic crystals. It is found that these desclinations act as terminal points for a planar cross grid of screw type dislocations and in the case of imperfect disclinations, this wall is also a grain boundary. Furthermore, a twist disclination dipole is synonymous with a finite wall of parallel screw type dislocations.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica 32 (1979), S. 165-179 
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Die Methoden der Differentialgeometrie werden auf den Ausdehnungsvorgang angewendet. Im besonderen wird gezeigt, daß Ausdehnungen entweder elastisch, plastisch, oder durch Zerreißen erfolgen können. Alle Beziehungen und Tensorgrößen, die zur Beschreibung der Ausdehnungen notwendig sind, werden im Detail diskutiert.
    Notes: Summary The concepts of differential geometry have been applied to the expansion process. Specifically, it has been shown that such expansions can occur either elastically, plastically or by tearing. All of the reference circuits and tensor quantities necessary to describe these expansions have been discussed in detail.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica 33 (1979), S. 207-228 
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Die Methoden der Differentialgeometrie werden angewendet, um zu zeigen, daß jeder deformierte Körper entweder mit der klassischen Elastizitätstheorie oder mittels der Versetzungstheorie beschrieben werden kann. Diese Dualität ist besonders wirksam und erlaubt jedes elastische und/oder plastische Problem in einheitlicher Art zu formulieren.
    Notes: Summary The methods of differential geometry have been utilized to show that any deformed body can be described in terms of either classical elasticity theory or else in terms of dislocation theory. This duality is extremely powerful and allows any problem involving elasticity and/or plasticity to be formulated in a unified manner.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 215 (1968), S. 39-55 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The gamma-ray spectra of several resonances in the45Sc(p, γ)46Ti reaction were measured using a 5 cm3 Ge(Li) detector. A thick target was bombarded with 1377 and 1660 keV protons, several resonances were therefore excited at each proton bombarding energy. The decay and energy of 30 excited levels were investigated. The intensity of all transitions to the ground state agrees within an error of about 9% with the total intensity of all transitions starting from the proton capture states, which indicates that low energy transitions between high-excited levels are of no importance. We have calculated a theoretical primary gamma-ray spectrum that fits the experimental averaged spectrum rather well.
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  • 5
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The gamma-ray decay of the 1658 keV resonance, which is a member of the isobaric analogues of the 1904 keV 3/2− level in44Ca, has been studied with a Ge(Li) detector. A number of gamma-ray transitions are described and associated with the decay of 15 levels between 1.50 and 3.05 MeV. These observations have made it possible to deduce spin and parity assignments to some of the levels. By comparing excited levels of43Sc and45Sc it has been possible to assign certain levels as members of one negative-parity band and two positive-parity bands withK π=1/2+ and 3/2+.
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  • 6
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The59Co(p, γ)60Ni reaction has been investigated in the proton energy regionE p=1365–2150 keV. Decay schemes and branching ratios have been determined for ten resonances, five of which have been identified as possible analogues or fragments of analogues of the ground state (5+) and the 58.6 keV (2+), 277.1 keV (4+), 288.4 keV (3+), and 435.7 keV (5+) levels in60Co. At eight of the resonances most of the decay seems to go via a group of states with an excitation energy of 5–9 MeV. The investigated analogue states give a Coulomb displacement energy of 9118±7 keV.
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  • 7
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The64Ni(p, γ)65Cu reaction has been studied in the proton energy rangeE p =2.05–2.55 MeV. The gamma-ray spectra were recorded with a three-crystal pair spectrometer at proton energy differences of 19 keV covering the proton energy range. An average gamma-ray spectrum was formed by adding all the individual spectra after proper adjustment as a result of the alterations in proton energy. The intensities of the gamma rays to final states with knownJ π-values were tested against theoretical calculations based on the Hauser-Feshbach theory. The gamma-ray strength function for energies lower than 9 MeV has been extracted from the experiment.
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  • 8
    ISSN: 1434-601X
    Keywords: 25.40.Fq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cross sections for74, 76, 77, 78Se(n, p)74, 76, 77, 78As,76,Se(n,2n)75Se and80Se(n, α)77,Ge reactions have been measured in the energy range from 13.0 to 16.6 MeV by the activation technique using Ge(Li) detectorγ-ray spectroscopy. Samples of selenium of natural isotopic composition were used as targets. The measurements provide information on the evolution of the (n, p) excitation functions with the increasing target neutron number (isotopic effect). The reaction model combining the compound nucleus and the preequilibrium emission processes is used to interpret these three types of reactions. The isotopic trend for the (n, p) reactions due to the neutron-proton competition in the compound nucleus is satisfactorily reproduced. However, a further experimental and theoretical work is needed for a better understanding of the origins of discrepancies which are suggested to be related to the precompound aspects of the assumed reaction model.
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  • 9
    ISSN: 1434-601X
    Keywords: 25.40.Fq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cross sections for70,72,73,74Ge(n, p)70,72,73,74Ga,70Ge(n, 2n)69Ge,72Ge (n,α)69Zn m and74Ge(n, α)71Zn m reactions are measured in the energy range from 13.0 to 16.6 MeV by the activation method using Ge(Li) detectorγ-ray spectroscopy and compared with predictions of the reaction model incorporating preequilibrium and equilibrium emission mechanisms to interpret the energy dependence of the isotopic effect occuring in the (n, p) reaction. The fitted single-particle state-density parametersg, determined here for the germaniums are discussed together with theg-values found previously for the Se, Zr and Pd isotopic chains. A validity of the consistency condition between the precompound and compound models, which relatesg to the experimental level-density parametera viaa=π 2 g/6 is demonstrated.
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  • 10
    ISSN: 1434-601X
    Keywords: 25.40.Fq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cross sections for the (n, p) reaction on64,66,67,68Zn isotopes have been measured by the activation method and successfully described in terms of the statistical multistep direct and the novel statistical multistep compound reaction model.
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