ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    UNISOFT – a program package for lattice-dynamical calculations (1987)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 20 (1987), S. 134-139 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The program package UNISOFT has been developed for lattice-dynamical calculations. Phonon dispersion curves can be calculated for any crystal structure with up to 20 atoms per primitive cell. The interaction between each individual pair of atoms can be modelled by one or more interaction types such as longitudinal and transverse springs (Born–von Karman model), Born–Mayer potential, Lennard-Jones potential, van der Waals potential, Coulomb potential, shell model. In addition to the model calculation part, UNISOFT contains several auxiliary programs dealing with group-theoretical analysis, neighbourhood analysis, plot of the phonon dispersion, calculation of partial derivatives, check of rotational invariance, calculation of local electrical fields and gradients, calculation of phonon intensities. In combination with a spectrometer for inelastic neutron scattering, UNISOFT provides a tool for the optimization of experiments as well as for a first interpretation of the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889887086977
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Electrogyration effect in alums (1976)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 892-895 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The electrogyration effect in 31 alums has been measured within the range 350 to 700 nm. The coefficients of electrogyration show an unexpectedly wide variation in alums of different composition and structural type. The effect is obviously related to the symmetry of the constituents and to their bonding interaction with water molecules. The dispersion of the electrogyration can be described by a formula which is also valid for natural optical activity. In contrast to other electro-optical effects Miller's rule does not apply for the electrogyration of the alums.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739476001770
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Electrogyration and piezogyration in NaClO3 (1979)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 35 (1979), S. 225-232 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A method is developed for measuring electrogyration and piezogyration effects in polar crystals. The influence of linear electro-optic and piezo-optic effects is discussed in detail. By the use of different directions of measurement, the tensorial behaviour of the induced gyration is proved unequivocally. The magnitudes of the electrogyration and piezogyration coefficients are 10-16 m V-1 and 10-15 m2 N-1 respectively. The relations between constants measured under different thermodynamic conditions are considered. An analysis of results on the basis of a coupled oscillator model reveals a strong sensitivity of induced gyration to changes in the arrangement of the oscillators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739479000383
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Anisotropic bond polarizabilities in birefringent crystals (1988)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 320-326 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Based on the concept of bond polarizabilities the optical properties of a crystal are traced back to the orientation of its bonds and to the individual bond parameters \bar \betaand Δβ. A test with various sulfate compounds shows that the average bond parameters \bar \beta describe the average refractive indices with a higher accuracy than the traditional model of ionic polarizabilities. The anisotropic part of a bond polarizability, Δβ, is considered to be the origin of optical birefringence. Values for Δβ are evaluated in MCO3 and MSO4 (M = Mg, Ca, Sr, Ba). In different crystals the same values for Δβ have been discovered for the C-O and the S-O bonds. Δβ of the M-O bonds depends in a characteristic way on the bond length. A simple method is used to calculate local field effects in accordance with the model of bond polarizabilities. Possible applications of bond polarizabilities for the determination of structural quantities are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767387012492
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Polar Kerr effects and Magnetic circular dichroism in YBa"2Cu"3O"7"-"δ films
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 216 (1993), S. 284-292 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(93)90072-X
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Zur Klassifikation der Zustände des 5-dimensionalen harmonischen Oszillators (1966)
    Springer
    The European physical journal 190 (1966), S. 25-59 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A classification of the eigenstates of the harmonic quadrupole oscillator is given within the framework of the Lie-AlgebraB 2 ofR(5). There still exists the problem of complete classification, since the multiplicityd v (l 2) for seniority numbersv≧6 may be greater than one. For these multiplicitiesd v (l 2) easily managable recursion formulae are derived and therefore their explicit calculation for arbitraryv andl 2 is easily possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01340347
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    3,3 resonance and Nucleon pole model forpp→ppπ0 andpp→pnπ+ (1974)
    Springer
    The European physical journal 267 (1974), S. 393-398 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Nucleon pole and 3,3 resonance pole contributions are considered for the reactionspp→ppπ0 andpp→pnπ + at low and medium incident proton energies. The total and various differential cross sections are calculated, also for polarized nucléons, and compared with experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01669972
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    πd Backward scattering via isobars in the deuteron (1974)
    Springer
    The European physical journal 268 (1974), S. 299-306 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Pion-deuteron elastic backward scattering atp π lab ∼ 0.2–1.0 GeV/c is analyzed in terms of a two-particle exchange mechanism. Inclusion of isobarsΔ (1236) in the intermediate states, such that the initial or final deuteron is in aΔΔ configuration, produces qualitative agreement with the observed structure of the excitation function. IntermediateN′(1520) andN′(1535) states are found to be negligible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01669465
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Bound states and scattering from bound states in the light-front field theory dynamics (1980)
    Springer
    The European physical journal 295 (1980), S. 219-234 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Starting from the Weinberg rules we derive a covariant form of the relativistic Schrödinger equation and formulate the bound state problem in the light-front field theory dynamics. We present an explicit rule for embodying the two-body subsystem in the three-body space and demonstrate that the cluster decomposition property is explicitly preserved in the light front field theory dynamics. As an application of these results we write amplitudes forπd→nN *, πd→πpn, andπd→πd, in the impulse approximation, in terms of the internal bound state wave functions and two-body reducedt-matrix elements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412201
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    CuCl nanocrystals in alkali-halide matrices under hydrostatic pressure (1999)
    Springer
    The European physical journal 12 (1999), S. 147-155 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 64.70.Kb Solid-solid transitions [:AND:] 62.50.+p High-pressure and shock-wave effects in solids and liquids - 78.55.Hx Other solid inorganic materials - 71.35.Cc Intrinsic properties of excitons; optical absorption spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: CuCl nanocrystals in crystalline alkali-halide matrices have been investigated under hydrostatic pressures up to 18 GPa. The pressures of structural phase transitions in CuCl have been determined both for different nanocrystal sizes and for different matrices (NaCl, LiCl, KCl). For CuCl nanocrystals in NaCl an increase of the transition pressure with decreasing nanocrystal size is observed, which is explained by the increasing importance of surface pressure for small nanocrystals. We found higher transition pressures for the LiCl matrix than for the NaCl matrix. The reason for this is that the pressure which acts on the nanocrystal differs from the external pressure. A simple elastic model describes the effective pressure transmitted from the matrix to the nanocrystal. With CuCl nanocrystals embedded in KCl we have studied the behavior of nanocrystals during a phase transition of the matrix. Additionally we have determined the pressure coefficients of the exciton energies of the CuCl nanocrystals, which depend on the elastic properties of the matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050989
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...