BRAZILIAN JOURNAL OF PHYSICS

The cross sections Of D(2) (v,j) + Ni(n) (T), n = 19 and 20, collision systems have been estimated by using Artificial Neural Networks (ANNs). For training, previously determined cross section values via molecular dynamics simulation have been used. The performance of the ANNs for predicting any quantities in molecule-cluster interaction has been investigated. Effects of the temperature of the clusters and the rovibrational states of the molecule are analyzed. The results are in good agreement with previous studies

CROATICA CHEMICA ACTA

Dissociative chemisorption probabilities for H(2)(v, j) + Ni(100) collision systems have been estimated by using Artificial Neural Network (ANN). For training, previously determined probability values via molecular dynamics simulations have been used. Performance of the ANN, for predicting any quantities in the molecule-surface interaction, has been investigated. Effects of the surface sites and the rovibrational states of the molecule on the process are analyzed. The results are in good agreement with the related previous studies

INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY

The reactive and scattering channels of the D(2)(v, j) + Ni(100) collision system are studied using quasiclassical molecular dynamics simulations. The interaction between the D(2) and the atoms of the surface is modeled by a LEPS (London-Eyring-Polani-Sato) potential energy function. The molecule is aimed at three different impact sites (atop, bridge, and center) of a rigid Ni(100) surface along the normal direction with various collision energies less than or equal to1.0 eV. Dissociative chemisorption probabilities are computed for different rotational states of the molecule. Probability distributions of the final rovibrational states of the ground-state Dp molecule scattered from those impact sites are also computed as a function of the collision energy. Higher collision energy results in excitation of higher rotational and/or vibrational states of the scattered molecule. At collision energies below 0.1 eV an indirect dissociation mechanism (through molecular adsorption) dominates the reaction. (C) 2001 John Wiley & Sons, Inc

Investigation of A similar to 100 mass region up to exotic with interacting boson model

Rabida International Scientific Meeting on Nuclear Physics -- JUL 04-10, 2009 -- Int Univ Andalucia, La Rabida, SPAINWOS: 000283268100021Even-even nuclei in the A similar to 100 mass region are investigated within the framework of the interacting boson model-1 (IBM-1). The parametrization established on the basis of known elements is then used to predict properties of the unknown. This paper includes the predicted energy spectra and the potential energy surface obtained from the IBM-1 hamiltonian in the classical limit.CPAN Ingenio 2010, Univ Seville, Univ Huela, Int Univ Andalucia, Spanish Minist Sci Educ, Junta Andalucia, European Phys So

Description of nuclei in the A similar to 100 mass region with the interacting boson model

WOS: 000282276700020Even-even nuclei in the A similar to 100 mass region are investigated within the framework of the interacting boson model-1 (IBM-1). The study includes energy spectra and electric quadrupole transition properties of zirconium, molybdenum, ruthenium and palladium isotopes with neutron number N >= 52. A global parametrization of the IBM-1 Hamiltonian is found leading to a description of about 300 collective levels in 30 nuclei with a root-mean-square deviation from the observed level energies of 120 keV. The importance of the d(5/2) subshell closure at neutron number N = 56 is pointed out. The geometric character of the nuclei can be visualized by plotting the potential energy surface V (beta, gamma) obtained from the IBM-1 Hamiltonian in the classical limit. The parametrization established on the basis of known elements is used to predict properties of the unknown, neutron-rich isotopes (106)Zr, (112)Mo, (116)Ru and (122)Pd.Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [107T557]; Agence Nationale de Recherche, FranceFrench National Research Agency (ANR) [ANR-07-BLAN-0256-03]This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under project no 107T557, and by the Agence Nationale de Recherche, France, under contract no ANR-07-BLAN-0256-03

The Effect of the Deformation Parameter on the Cross Sections for Reactions: Pd-110(d,n)Ag-111 and Pd-110(d, 2n)(110m) Ag

SARPUN, Ismail Hakki/0000-0002-9788-699XWOS: 000429682300006In this study, we focused on the effects of the deformation parameter on the cross sections. First, the deformation parameters of target nucleus Pd-110 was determined within the interacting boson model (IBM). Later this parameter was used in the TALYS-1.8 code to calculate the cross sections of the Pd-110(d,n)Ag-111 and Pd-110(d, 2n)(110m) Ag reactions. Moreover, other deformation parameters obtained RIPL-3 and TALYS default were used for the cross section calculation. The calculated results were compared with the experimental nuclear reaction data from EXFOR

Dynamics of the D-2+Ni(100) collision system: Analysis of the reactive and inelastic channels

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Shape phase transition in odd-even nuclei: From spherical to deformed gamma-unstable shapes

Shape phase transitions in odd-A nuclei are investigated within the framework of the interacting boson-fermion model. The case of a single j=9/2 fermion coupled to an even-even boson core is considered. This boson core transits from spherical to γ-unstable shapes depending on the value of a control parameter in the boson Hamiltonian. The effect of the coupling of the odd particle to this core along the shape transition and, in particular, at the critical point is discussed. For that purpose, the ground-state energy surface in terms of the β and γ shape variables for the even core and odd-even energy surfaces for the different K states coming from j=9/2 are constructed. The evolution of each individual coupled state along the transition from the spherical [U(5)] to the γ-unstable [O(6)] situation is investigated. One finds that the core-fermion coupling gives rise to a smoother transition than in the even-core case.INFN-MCYTMECFEDER FIS2008-04189CPAN-IngenioJunta de Andalucí

Odd nuclei and shape phase transitions: the role of the unpaired fermion

Fortunato, Lorenzo/0000-0003-2137-635X; Arias, Jose M./0000-0001-7363-4328; Alonso, Clara E/0000-0001-9365-4107WOS: 000289158000003Shape phase transitions in even and odd systems are reviewed within the frameworks of the Interacting Boson Model(IBM) and the Interacting Boson Fermion Model(IBFM), respectively and compared with geometric models when available. We discuss, in particular, the case of an odd j = 3/2 particle coupled to an even-even boson core that undergoes a transition from the spherical limit U(5) to the gamma-unstable limit O(6). Energy spectrum and electromagnetic transitions, in correspondence of the critical point, display behaviors qualitatively similar to those of the even core and they agree qualitatively with the model based on the E(5/4) boson-fermion symmetry. We describe then the U-BF(5) to SUBF(3) transition when a fermion is allowed to occupy the orbits j = 1/2, 3/2,5/2. The additional particle characterizes the properties at the critical points in finite quantum systems