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

Nuclear structure and weak rates of heavy waiting point nuclei under rp-process conditions

WOS: 000392295900009The structure and the weak interaction mediated rates of the heavy waiting point (WP) nuclei Zr-80, Mo-84, Ru-88, Pd-92 and Cd-96 along N = Z line were studied within the interacting boson model-1 (IBM-1) and the proton-neutron quasi-particle random phase approximation (pn-QRPA). The energy levels of the N = Z WP nuclei were calculated by fitting the essential parameters of IBM-1 Hamiltonian and their geometric shapes were predicted by plotting potential energy surfaces (PESs). Half-lives, continuum electron capture rates, positron decay rates, electron capture cross sections of WP nuclei, energy rates of beta-delayed protons and their emission probabilities were later calculated using the pn-QRPA. The calculated Gamow-Teller strength distributions were compared with previous calculation. We present positron decay and continuum electron capture rates on these WP nuclei under rp-process conditions using the same model. For the rp-process conditions, the calculated total weak rates are twice the Skyrme HF+BCS+QRPA rates for Zr-80. For remaining nuclei the two calculations compare well. The electron capture rates are significant and compete well with the corresponding positron decay rates under rp-process conditions. The finding of the present study supports that electron capture rates form an integral part of the weak rates under rp-process conditions and has an important role for the nuclear model calculations.Higher Education Commission (Pakistan)Higher Education Commission of Pakistan [20-3099]J.-U. Nabi also wishes to acknowledge the support provided by the Higher Education Commission (Pakistan) through the HEC Project No. 20-3099

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

Nuclear structure properties of even-even chromium isotopes and the effect of deformation on calculated electron capture cross sections

WOS:000567817300018In this study, we investigate the role of the nuclear deformation on the calculated electron capture cross section (ECC) of even-even chromium (Cr) isotopes. We first determined the nuclear structure properties of these nuclei within the interacting boson model-1 (IBM-1). The energy spectra and E2 transition probabilities were calculated by fitting the parameters in the model formalism. The analysis of the potential energy surface were also performed to predict the geometric shape of the Cr nuclei by plotting their contour plot in the plane of (beta, gamma ) deformation parameters. Later, we calculated the ECC within the proton-neutron quasiparticle random phase approximation (pn-QRPA) model. In particular we studied how the calculated ECC changed with different values of nuclear deformation parameter. The calculated Gamow-Teller (GT) strength distributions were widely spread among the daughter states. The total GT strength decreased with increasing value of the beta parameter. The computed ECC values, however, increased with increase in the beta value of the Cr isotopes. (c) 2020 Elsevier B.V. All rights reserved.Higher Education Commission, PakistanHigher Education Commission of Pakistan [5557/KPK/NRPU/RD/HEC/2016, 9-5(Ph-1-MG-7)/PAK-TURK/RD/HEC/2017]; Pakistan Science Foundation [PSFTUBITAK/KP-GIKI (02)]; Scientific and Technical Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [119T127]J.-U. Nabi would like to acknowledge the support of the Higher Education Commission, Pakistanthrough project numbers 5557/KPK/NRPU/R&D/HEC/2016, 9-5(Ph-1-MG-7)/PAK-TURK/R&D/HEC/2017 and Pakistan Science Foundation through project number PSFTUBITAK/KP-GIKI (02). M. Boyukata acknowledges the support of the Scientific and Technical Research Council of Turkey (TUBITAK), under the project number 119T127

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

48-5