Now showing items 1-15 of 15

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      A local anharmonic treatment of vibrations of methane  [Article]

      Arias Carrasco, José Miguel; Pérez Bernal, Francisco; Frank, A.; Lemus Casillas, Renato; Bijker, R. (1997)
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      A symmetry adapted approach to molecular spectroscopy: the anharmonic oscillator symmetry model  [Article]

      Bijker, R.; Arias Carrasco, José Miguel; Pérez Bernal, Francisco; Frank, A.; Lemus Casillas, Renato (1996)
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      A Symmetry-Adapted Algebraic Approach to Molecular Spectroscopy  [Article]

      Pérez Bernal, Francisco; Arias Carrasco, José Miguel; Frank, A.; Lemus, R.; Bijker, R. (Scielo, 1996)
      We apply a symmetry-adapted algebraic model to the vibrational excitations in D_3h and T_d molecules. A systematic procedure is used to establish the relation between the algebraic and configuration space formulations. In ...
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      Algebraic description of stretching and bending modes in nonlinear triatomic-molecules  [Article]

      Arias Carrasco, José Miguel; Pérez Bernal, Francisco; Lemus Casillas, Renato; Frank, A. (1995)
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      Consistent baryon mapping of quark systems  [Article]

      Pittel, Stuart; Arias Carrasco, José Miguel; Dukelsky, Jorge; Frank, A. (American Physical Society, 1994)
      We present a new and consistent mapping of colorless three-quark clusters onto colorless triplet fermions (baryons) and test it in the context of a three-color extension of the Lipkin model. For systems with two triplets ...
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      Eigenvalue correlations and the distribution of ground state angular momenta for random many-body quantum systems  [Article]

      Barea, J.; Bijker, R.; Frank, A. (The American Physical Society, 2009)
      The observed preponderance of ground states with angular momentum L=0 in many-body quantum systems with random two-body interactions is analyzed in terms of correlation coefficients (covariances) among different eigenstates. ...
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      Evaluation of impurity densities from charge exchange recombination spectroscopy measurements at ASDEX Upgrade  [Article]

      McDermott, R. M.; Dux, R.; Pütterich, T.; Geiger, B.; Kappatou, A.; Lebschy, A.; Bruhn, C.; Cavedon, M.; Frank, A.; Harder, N. den; Viezzer, Eleonora (Institute of Physics Publishing, 2018-07-26)
      At ASDEX upgrade (AUG) a new framework for the evaluation of impurity densities based on measurements from charge exchange recombination spectroscopy (CXRS) diagnostics has been developed. The charge exchange impurity ...
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      Image reconstruction techniques applied to nuclear mass models  [Article]

      Morales, Irving O.; Isacker, P. Van; Velázquez, V.; Barea, J.; Mendoza-Temis, J.; López Vieyra, J. C.; Hirsch, J. G.; Frank, A. (The American Physical Society, 2010)
      A new procedure is presented that combines well-known nuclear models with image reconstruction techniques. A color-coded image is built by taking the differences between measured masses and the predictions given by the ...
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      New supersymmetric quartet of nuclei in the A ∼ 190 mass region  [Article]

      Barea, J.; Bijker, R.; Frank, A.; Graw, G.; Hertenberger, R.; Wirth, H. F.; Christen, S.; Jolie, J.; Tonev, D.; Balodis, M. (The American Physical Society, 2009)
      We present evidence for a new supersymmetric quartet in the A~190 region of the nuclear mass table. New experimental information on transfer and neutron capture reactions to the odd-odd nucleus 194Ir strongly suggests the ...
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      On the relation between algebraic and configuration space calculations of molecular vibrations  [Article]

      Pérez Bernal, Francisco; Bijker, R.; Frank, A.; Lemus, R.; Arias Carrasco, José Miguel (Elsevier, 1996-03)
      The relation between algebraic and traditional calculations of molecular vibrations is investigated. An explicit connection between interactions in configuration space and the corresponding algebraic interactions is established.
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      Phase transitions and critical points in the rare-earth region  [Article]

      García Ramos, José Enrique; Arias Carrasco, José Miguel; Barea, J.; Frank, A. (American Physical Society, 2003-08-01)
      A systematic study of isotope chains in the rare-earth region is presented. For chains 60 144 2 154Nd, 62 146 2 160Sm, 64 148 2 162Gd, and 66 150 2 166 Dy, energy levels, E2 transition rates, and two-neutron separation ...
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      Probing additional dimensions in the universe with neutron experiments  [Article]

      Frank, A.; Van Isacker, Piet; Gómez Camacho, Joaquín José (Elsevier, 2004)
      We carry out a simple analysis of (n+3)-dimensional gravity in the context of recent work on 'large' supplementary dimensions and deduce a formula for the expected compactification radius for the n additional dimensions ...
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      Search for E(5) symmetry in nuclei: The Ru isotopes  [Article]

      Frank, A.; Alonso Alonso, Clara Eugenia; Arias Carrasco, José Miguel (American Physical Society, 2002-01-01)
      We carry out an interacting boson model study of the Ru isotopes using a U(5)-SO(6) transitional Hamiltonian with fixed parameters, where the variation is due only to the change in boson number N. Transitional behavior ...
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      Single-particle transfer and nuclear supersymmetry  [Article]

      Barea, J.; Bijker, R.; Frank, A.; Loyola, G. (American Physical Society, 2001-12-01)
      Transfer reactions constitute a stringent test for nuclear supersymmetry, a theory that simultaneously describes neighboring nuclei with bosonic and fermionic character. We construct and analytically evaluate ...
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      U(5)-O(6) transition in the interacting boson model and the E(5) critical point symmetry  [Article]

      Arias Carrasco, José Miguel; Alonso Alonso, Clara Eugenia; Vitturi, Andrea; García Ramos, José Enrique; Dukelsky, Jorge; Frank, A. (American Physical Society, 2003-10-01)
      The relation of the recently proposed E(5) critical point symmetry with the interacting boson model is investigated. The large-N limit of the interacting boson model at the critical point in the transition ...