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The Institute of Physics ( IOP ) по журналам "EPL (Europhysics Letters)"

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  • G. V. Oppen (1990-01-01)
    Level crossings of Stark substates with m = 0 differing in reflection parity are considered with respect to the detection of parity violation in atomic physics. An interesting example of a 0+-0- crossing occurs in the ...
  • Y. Dagan; R. Krupke; G. Deutscher (2000-07-01)
    Tunneling characteristics along the [110] direction were measured in Y1Ba2Cu3O7 InsulatorIn junctions as a function of the magnetic field H, applied parallel to the plane of the junction, along the c-axis. The junctions ...
  • J. M. Bang; L. S. Ferreira; E. Maglione (1992-04-15)
    Using three-body wave functions for 11Li, electric-dipole sum rules are calculated and discussed. Energies of the soft dipole mode are found to agree with experimental ones. Both for light and heavy targets, the electric ...
  • G. Dillon (1992-11-01)
    In the light of the General Parametrization Method and the new mass relationships recently derived by Morpurgo, we discuss the old problem of assigning a definite mass to a broad resonance, the (1232). A value of (1214.6 ± 3.5) ...
  • R. Kerkoud; P. Auban-Senzier; D. Jérome; J. M. Lambert; A. Zahab; P. Bernier (1994-02-10)
    We report the measurement of the 13C NMR frequency in K3C60 under pressure. Comparing pressure dependences of the hyperfine spin lattice relaxation rate and of the resonance frequency provides the first determination of ...
  • H. Mayaffre; P. Wzietek; C. Lenoir; D. Jérome; P. Batail (1994-10-20)
    We present 13C NMR measurements carried out under pressure and between 10 and 300 K on a single crystal of the organic superconductor -(ET)2Cu[N(CN)2]Br. Under pressure, the large variation of the Knight shift is interpreted ...
  • G. Quirion; C. Bourbonnais; E. Barthel; P. Auban; D. Jérome; J. M. Lambert; A. Zahab; P. Bernier; C. Fabre; A. Rassat (1993-01-10)
    We report the pressure and temperature dependences of 13C nuclear spin-lattice relaxation time T1 in the normal state of K3C60. From the 1/T1T temperature and pressure profiles, a Fermi-liquid theory is used to investigate ...
  • R. Blinc; T. Apih; A. Fricelj; J. Dolinek; J. Seliger; A. Fuith; W. Schranz; H. Warhanek; D. C. Ailion (1997-09-15)
    We have directly determined with 14N NMR the SCN head-tail flipping rate in KSCN on going through the order-disorder phase transition at Tc. The results can be explained in terms of an asymmetric double-well potential ...
  • F. M. Mulder; R. C. Thiel (1994-03-20)
    155Gd Mössbauer measurements on gadolinium metal have been performed at pressures up to 17 GPa and at T = 4.2 K for the first time. The three different crystallographic phases that Gd exhibits below 24 GPa can be distinguished. ...
  • P. Wzietek; D. Köngeter; P. Auban; D. Jérome; J. M. Bassat; J. P. Coutures; B. Dubois; Ph Odier (1989-02-15)
    We present the first 17O NMR data obtained in YBa2Cu3O7- powder with Tc = 90 K in which oxygen sites on Cu-O chains had been selectively populated by a gas exchange process performed at low temperature. A comparison between ...
  • D. Ridikas; M. H. Smedberg; J. S. Vaagen; M. V. Zhukov (1997-02-20)
    We have investigated the loosely bound halo candidate 19C in a neutron + core coupling model. A deformed Woods-Saxon potential is used for the neutron-core interaction and the coupled channels equations are solved with ...
  • H.-A. Bahr; U. Bahr; A. Petzold (1992-07-15)
    Multiple crack propagation caused by thermal shock can be described as a motion in a time-dependent potential with the restriction that no subsequent crack closure (healing) is possible. For equidistant parallel cracks, ...
  • V. V. Moshchalkov; L. Trappeniers; J. Vanacken (1999-04-01)
    The temperature dependence of the resistivity (T) of the novel Sr2.5Ca11.5Cu24O41 ladder compound under hydrostatic pressure of up to 8 GPa has been explained by assuming that the relevant length scale for electrical ...
  • D. Sornette (1987-11-15)
    A new mechanism for the appearance of 1/f noise in the phase of the reflection coefficient is described for disordered systems. It relies on the (1/d)-distribution of energy widths for Anderson localized states which is ...
  • K. Fukamachi (1994-05-20)
    We have found 1/f fluctuations in the Fermi-Pasta-Ulam equation, which is one of the simplest lattice models to describe fundamental properties of lattice vibrations of real substances. The crossover frequency fc between ...
  • C. Pinheiro; G. O. Pires; F. A. B. Rabelo de Carvalho (1994-02-10)
    A Maxwell-Chern-Simons field is minimally coupled to 3D gravity. Feynman rules are written down and 1-loop corrections to the gauge field self-energy are calculated. Transversality is verified and gauge field dynamical ...
  • I. Vickridge; A. L'Hoir; J. Gyulai; C. Cohen; F. Abel (1990-12-01)
    We have studied the excitation curve of the 27Al(p, )28Si narrow resonance (R = 105 eV) at 992 keV in random and axial channelling geometry on a clean (110) Al single crystal under UHV conditions. The results are compared ...
  • R. Blinc; J. Seliger; J. Dolinsek; D. Arcon (1993-08-10)
    Two-dimensional (2D) separation of interactions 13C NMR spectra of powdered C60 have been measured above and below the structural phase transition at Tc = 260 K. The comparison between experimental and simulated 13C powder ...
  • J. C. Ousset; H. Rakoto; J. M. Broto; G. Matzen; J. F. Bobo; J. Labbe; S. Askenazy (1991-03-15)
    In order to test the 2D character of the conductivity of high-Tc superconductors, we have elaborated GdBa2Cu3O7 films on (100) ZrO2. The c-axis is perpendicular to the plane of the films. Using magnetoresistance measurements ...
  • A. Garcimartín; H. L. Mancini; C. Pérez-García (1992-06-01)
    The dynamics of the fragmentation of a liquid drop falling in a miscible fluid is studied in a Hele-Shaw geometry. We show that this configuration allows quantitative measurements of the characteristic sedimentation velocity ...