Now showing items 1-20 of 680

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      Critical radii for alpha-particle elastic scattering  [Article]

      Lozano Leyva, Manuel Luis; Madurga Lacalle, Gonzalo; Hodgson, P. E. (Elsevier, 1979)
      The critical radii obtained from analyses of the elastic scattering of alpha-particles by a range of nuclei are found to be closely connected with the nuclear matter distributions obtained by summing the squares of ...
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      Nuclear-structure dependence of the fusion cross section for heavy ions  [Article]

      Lozano Leyva, Manuel Luis; Madurga Lacalle, Gonzalo (Elsevier, 1980)
      The energy dependence of the fusion cross section and its maximum value are well predicted, for a wide range of nuclei and energies, by introducing information on the nuclear matter density distribution into a simple formula
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      The role of rainbow refraction in heavy ion elastic scattering  [Article]

      Lozano Leyva, Manuel Luis; Jadraque Alonso, Antonio; Madurga Lacalle, Gonzalo (Elsevier, 1980)
      The energy dependence of both the strong absorption radius, Rsa, and the rainbow distance, Rr, in the elastic scattering of a dozen pairs of heavy ions is studied. Rsa decreases with energy linearly in E−13 while Rr increases ...
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      Double folding with a density-dependent effective interaction and its analytical approximation  [Article]

      Viñas, F. J.; Lozano Leyva, Manuel Luis; Madurga Lacalle, Gonzalo (American Physical Society, 1981)
      The real part of the optical potential for heavy ion elastic scattering is obtained by double folding of the nuclear densities with a density-dependent nucleon-nucleon effective interaction which was successful in describing ...
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      Refractive or diffractive interpretation of heavy-ion elastic scattering  [Article]

      Madurga Lacalle, Gonzalo; Jadraque Alonso, Antonio; Lozano Leyva, Manuel Luis (American Physical Society, 1981)
      A characteristic pattern frequently observed in the angular distribution of heavy-ion elastic scattering at moderate energies above the Coulomb barrier has been attributed either to a Fresnel diffraction or to a rainbow ...
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      Prealignment B(E2)-anomaly in 124Xe  [Article]

      Hanewinkel, H.; Gast, Werner; Kaup, U.; Harter, H.; Dewald, Alfred; Gelberg, Adrian; Reinhardt, R.; Von Brentano, Peter; Zemel, A.; Alonso Alonso, Clara Eugenia; Arias Carrasco, José Miguel (Elsevier, 1983)
      Lifetimes of 17 levels of 124Xe were measured using the Recoil Distance Doppler Shift method. An anomalous E2-reduction was observed, starting at Iπ = 8+ and Iπ = 5+ in the groundstate and in the quasi-gamma band respectively. ...
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      A phenomenological imaginary part of the optical potential for heavy ions  [Article]

      Quesada Molina, José Manuel; Lozano Leyva, Manuel Luis; Madurga Lacalle, Gonzalo (Elsevier, 1983)
      The depth of the imaginary part of the optical potential is derived from the assumption that, at a given energy and for each partial wave L, it is proportional to the compound nucleus density level up to a given excitation ...
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      A calculation of low-lying collective states in odd-even nuclei  [Article]

      Alonso Alonso, Clara Eugenia; Arias Carrasco, José Miguel; Bijker, R.; Iachello, F. (Elsevier, 1984)
      We present results of a calculation of properties of low-lying collective quadrupole states in odd-even nuclei within the framework of the proton-neutron interacting boson-fermion model.
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      Isothermal molecular-dynamics calculations  [Article]

      Rull Fernández, Luis Felipe; Morales, Juan J.; Cuadros, Francisco (American Institute of Physics Publising LLC, 1985)
      We have performed long-time runs of molecular-dynamics computer simulations of a two-dimensional Lennard-Jones system, without any scaling procedure. The thermodynamic properties show spontaneous fluctuations except when ...
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      Simple estimates of excitation energy sharing between heavy and light fragments in heavy-ion reactions  [Article]

      Dasso, Carlos Hugo; Lozano Leyva, Manuel Luis; Pollarolo, G. (American Physical Society, 1985)
      Qualitative arguments are used to estiamte the ratio of excitation energies between heavy and light fragments for asymmetric heavy-ion collisions. The value of this quantity is linked to the relative role played by inelastic ...
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      Nuclear structure information obtained from charge radii  [Article]

      Alonso Alonso, Clara Eugenia; Arias Carrasco, José Miguel; Iachello, F. (Elsevier, 1985)
      We analyze the nuclear structure information obtained from measurements of charge radii in even-even and even-odd nuclei terms of the interacting boson model. The observed deviations from the smooth behavior, R = R0A1 3, ...
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      Coupled channel effects in the scattering of 6,7Li BY 58Ni  [Article]

      Gómez Camacho, Joaquín José; Lozano Leyva, Manuel Luis; Nagarajan, M. A. (Elsevier, 1985)
      Using a single-particle description of 6,7Li and Woods-Saxon generated wavefunctions for 58Ni matter density distribution, the diagonal and transition densities are calculated. Folding these densities with the M3Y effective ...
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      Backbending of Dy isotopes described with the neutron-photon IBA plus two-quasiparticle model  [Article]

      Alonso Alonso, Clara Eugenia; Arias Carrasco, José Miguel; Lozano Leyva, Manuel Luis (Elsevier, 1986)
      The formalism of the neutron-photon interacting boson model, extended to include two-quasiparticle excitations, is used in a study of the high spin states of 154,156,158Dy isotropes. Good agreement is obtained between the ...
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      Test of the proton-neutron interacting boson-fermion model in the region around A=190  [Article]

      Arias Carrasco, José Miguel; Alonso Alonso, Clara Eugenia; Lozano Leyva, Manuel Luis (American Physical Society, 1986)
      We present systematic calculations on nuclei in the region around A=190 within the framework of the proton-neutron interacting boson-fermion model. Energy levels and electromagnetic properties of both positive and negative ...
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      Nonequilibrium phase transition to a time-dependent probability density for a model of charge-density waves  [Article]

      López Bonilla, Luis (American Institute of Physics Publising LLC, 1987)
      A nonequilibrium phase transition to a stable time-periodic one-particle probability density is found in a modified Fukuyama-Lee model of charge-density waves. The classical single-phase model of Grüner, Zawadowski, and ...
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      Nuclear field theory of spin dealignment in strongly rotating nuclei and the vacuum polarization induced by pairing vibrations  [Article]

      Barranco Paulano, Francisco; Gallardo Fuentes, María Isabel; Broglia, Ricard (Elsevier, 1987)
      Processes where particles are dressed by pairing vibrations and where their average field is modified by the Fock contribution of the pairing force are found to give rise to dynamical dealignments of the single-particle ...
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      Effect of elastic transfer in sub-barrier fusion between similar nuclei  [Article]

      Lozano Leyva, Manuel Luis; Vitturi, Andrea (American Physical Society, 1987)
      We study the effect of the elastic transfer process on sub-barrier fusion reactions between similar nuclei. The coupling to the elastic transfer channel is described in terms of a parity dependent potential, directly ...
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      Dispersive contribution to the nucleus-nucleus potential  [Article]

      Lozano Leyva, Manuel Luis (American Physical Society, 1987)
      With a simple parametrization of the empirical imaginary potential depths, the real potential induced by a dispersion relation is calculated analytically for the elastic scattering of O16 by several target nuclei. Between ...
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      Role of thermal fluctuations in the damping of the giant dipole resonance of spherical and deformed nuclei: 90Zr and 164Er  [Article]

      Gallardo Fuentes, María Isabel; Luis Simón, Francisco Javier; Broglia, Ricardo A. (Elsevier, 1987)
      We study the damping width of the giant dipole resonance (GDR) built on the ground state and on excited states of 90Zr, which is spherical at zero spin and temperature, and 164Er which is deformed. Neither of these nuclei ...
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      Polarization effects due to coupling of elastic to compound states  [Article]

      Nagarajan, M. A.; Andrés Martín, María Victoria; Lozano Leyva, Manuel Luis (Elsevier, 1987)
      From a compound nucleus level-density-dependent imaginary potential an energy-and angular-momentum-dependent polarization potential is obtained by using the dispersion relation. The effect of coupling in this way the ...