Abdullah Shams Bin Tariq

University of Rajshahi | RU · Department of Physics

Experimental differential cross sections of α elastic scattering by 90Zr in the 15.0–141.7 MeV range of the bombarding energies have been analysed within the framework of an optical model using non-monotonic (NM) potentials. These potentials are generated from the energy-density functional theory using a realistic two-nucleon potential coupled with...

The work of Jaffe, Jenkins and Kimchi [Phys. Rev. D79, 065014 (2009)] is revisited to see if indeed the region of congeniality found in their analysis survives further restrictions from nucleosynthesis. It is observed that much of their congenial region disappears when imposing conditions required to produce the correct and required abundances of t...

Angular distributions of the differential cross section of elastic scattering by 24 Mg, 28 Si, and 30 Si nuclei have been studied for various incident energies. The observed enhancement of differential cross sections at back angles, usually known as anomalous large angle scattering ALAS, cannot be explained in terms of the normal optical model pote...

We report calculations of the parameter B_K appearing in the Delta S=2 neutral kaon mixing matrix element, whose uncertainty limits the power of unitarity triangle constraints for testing the standard model or looking for new physics. We use two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical q...

We present results for masses of spin-1/2 and spin-3/2 double-charm baryons in quenched lattice QCD, from an exploratory study using a non-perturbatively improved clover action at beta=6.2. We have studied local operators and we observe, after appropriate projections, a good signal for the ground states. We also present results for single-charmed b...

The experimental differential cross section of the 12C+12C elastic scattering over a wide laboratory energy scale 25 ≦ Elab ≦ 360 MeV are analyzed within the framework of the optical model (OM) using non-monotonic (NM) nucleus-nucleus potential. The real parts of the NM potentials are derived from the energy density functional (EDF) formalism with...

This work illustrates, for the first time, the analysis of tensor analyzing powers ( T 20 , T 21 , T 22 ) along with the differential cross-section (CS) and the vector analyzing power iT 11 for the ⁶ Li+ ¹² C elastic scattering at 30 and 50 MeVwithin the framework of an optical model (OM) using microscopic shallow non-monotonic (NM) potentials. The...

Goldberg criterion' [Goldberg and Smith, Phys. Rev. Lett. 29 (1972) 500] tells that at sufficiently high energies, where pronounced refractive scattering with nuclear rainbow oscillations are followed by an 'exponential-type falloff' in the angular distribution, discrete ambiguities are eliminated for the deep monotonic potential. The criterion is...

The experimental differential cross-sections of 16O + 16O elastic scattering in the energy range 75 MeV ≤ Elab ≤ 1120 MeV are analysed using families of non-monotonic (NM) shallow nucleus–nucleus potential in the framework of the optical model. The experimental data is reproduced successfully using six families of NM potentials. It is found that al...

Digital modeling has the possibility of analyzing its data that represent reality more clearly، so a cartographic hydrological model was conducted by overlying models with maps layers to (potential erosion coefficients PAP_CAR، wells and runoff (SCS-CN) and cold wet climate model)،while geomorphic modeling through overlying (slope، geological map،...

This work reports, for the first time, the analysis of tensor analyzing powers ( T 20 , T 21 , T 22 ) along with the differential cross-section (CS) and the vector analyzing power iT 11 for the ⁶ Li + ¹² C elastic scattering at 30 and 50 MeV within the framework of an optical model (OM) using microscopic shallow non-monotonic (NM) potentials. The N...

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Nonmonotonic (NM) nucleus-nucleus potentials from the energy-density functional (EDF) theory including the Pauli principle have been considered for the nuclear incompressibility K in the range 188-266 MeV. The experimental cross sections of the O16+O16 elastic scattering over the 31-350 MeV incident energies have been analyzed in the optical model...

It has been a natural desire for a long time to be able to describe nuclear physics in terms of the fundamental strong interaction. Recently some significant progress has been made in this area in terms of lattice QCD calculations of simple nuclear physics processes such as nucleon nucleon scattering. An attempt is made to introduce the progress ma...

The data on the elastic scattering cross-section (CS) and vector analyzing power (VAP) of 6,7Li incident on 12C , 26Mg, 58Ni and 120Sn nuclei are analyzed in terms of an optical model (OM) potential, the real part of which is generated from a realistic two-nucleon interaction using the energy-density functional (EDF) formalism. The EDF-generated re...

Experimental cross section (CS) and vector analyzing power (VAP) data of the 6Li–28Si elastic scattering at 22.8 MeV are analyzed in the coupled-channels (CC) and coupled discretized continuum channels (CDCC) methods. Non-monotonic (NM) 6Li and α potentials of microscopic origin are employed, respectively, in the CC calculations and to generate fol...

This work compares the performance of traditional phenomelogical Woods-Saxon (WS) and squared WS (SWS) potentials with that of a non-monotonic (NM) potential, microscopically derived using the energy-density functional (EDF) formalism from a realistic two-nucleon potential that includes the Pauli priciple. The experimental differential cross-sectio...

It has been a natural desire for a long time to be able to describe nuclear physics in terms of the fundamental strong interaction. Recently some significant progress has been made in this area in terms of lattice QCD calculations of simple nuclear physics processes such as nucleon nucleon scattering. An attempt is made to introduce the progress ma...

The experimental differential cross-sections for the 6Li elastic scattering by 28Si over the incident energies ELi=7.5–99.0 MeV and vector analyzing power data at 22.8 MeV have been analyzed in terms of a non-monotonic potential, microscopically derived from the energy-density functional (EDF) theory using a realistic two-nucleon potential that inc...

This work revisits the pentaquark episode, particularly in reference to lattice QCD, to collect in one place the lessons that have been or should be learnt. This also examines whether, and if yes, where, there might be any prospect for future studies of pentaquarks and the role of lattice QCD in it. Tests such as volume dependence, and hybrid bound...

The 16O + 12C elastic scattering data have been well described, for the first time, with a shallow folded potential obtained from a single folding method. The constituent parameters of the potential, excepting one, for its real part are generated from the nucleon–16O and α–16O potentials, and the cluster structure of 12C. Only the repulsive part of...

The differential cross sections for the elastic scattering of α particles by 40,44,48Ca, over a wide range of incident energies, have been analyzed using a deep as well as shallow non-monotonic optical potential and compared with those using a squared Woods–Saxon (SWS) potential. The shallow non-monotonic potential exhibits a volume integral for th...

We report calculations of BK using two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical quark mass at fixed lattice spacing. We see some evidence for dynamical quark effects. In particular BK decreases as the sea quark masses are reduced towards the up/down quark mass. Our meson masses are quite...

We report calculations of BK using two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical quark mass at fixed lattice spacing. We see some evidence for dynamical quark effects. In particular BK decreases as the sea quark masses are reduced towards the up/down quark mass. Our meson masses are quite...

We report calculations of the parameter BK appearing in the ?S = 2 neutral kaon mixing matrix element, whose uncertainty limits the power of unitarity triangle constraints for testing the standard model or looking for new physics. We use two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical quark...

We report calculations of B_K using two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical quark mass at fixed lattice spacing. We see some evidence for dynamical quark effects. In particular B_K decreases as the sea quark masses are reduced towards the up/down quark mass. Our meson masses are qui...

The α elastic scattering on "non-alpha cluster" nuclei 44,48 Ca as well as their "alpha cluster" isotope 40 Ca has been successfully described by a potential derived from a single-folding model, in which the most of the nucleons in a nucleus exist in α-like clusters and the rest, in an unclustered nucleonic configuration. The folding potential does...

A folding potential describing the α-scattering on 16O over a broad energy range 25.8-146.0 MeV is constructed on the basis of α-like cluster and unclustered-nucleon configurations of 16O. The resulting potential does not need any renormalization to fit the angular distribution of elastic cross-sections. The effects of the repulsive part of α-α and...

The differential cross-section of the 27Al(α, t)28Si reaction for 64.5 MeV incident energy has been reanalysed in DWBA with full finite range using a squared Woods–Saxon (Michel) α-nucleus potential with the modified value of the depth parameter α = 2.0 as reported in a comment article by Michel and Reidemeister. This new value produces significant...

: Full finite-range macroscopic calculations in the distorted-wave Born approximation have been performed using the molecular and Michel α-nucleus potentials to analyze the angular distributions of cross-sections of the 27Al(α, d)29Si reaction, at 26.5 and 27.2 MeV incident energies, leading to seven transitions up to the excitation energy E X = 4....

Full finite-range macroscopic calculations in the distorted-wave Born approximation have been performed using the molecular and Michel alpha-nucleus potentials to analyze the angular distributions of cross-sections of the 27Al(alpha, d)29Si reaction, at 26.5 and 27.2 MeV incident energies, leading to seven transitions up to the excitation energy EX...

Effects of three different α-nucleus potentials, the normal Woods-Saxon (WS), the squared WS and the molecular, have been studied using the differential cross-section data of inelastically scattered α-particles on 24Mg and 28Si at 54 and 26 MeV incident energies, respectively. The angular distributions of inelastic scattering to the first 2+ and 4+...

Microscopic and macroscopic distorted wave Born approximation calculations have been performed using the molecular, standard Woods-Saxon (WS), and squared WS (Michel) α-nucleus potentials to analyze the angular distributions of cross sections for nine transitions to the even-parity states up to excitation energy Ex=4.26 MeV of 31P and eight transit...

Effects of three different alpha-nucleus potentials, the normal Woods-Saxon (WS), the squared WS and the molecular, have been studied using the differential cross-section data of inelastically scattered alpha-particles on 24Mg and 28Si at 54 and 26 MeV incident energies, respectively. The angular distributions of inelastic scattering to the first 2...

The differential cross section of the 28Si(α,p)31P reaction for 26 MeV incident energy has been analyzed in the distorted wave Born approximation (DWBA) with zero and full-finite range using a deep and shallow optical, Michel and molecular potentials in the incident channel, and a usual optical model potential for proton in the final channel. The p...

Microscopic and macroscopic distorted wave Born approximation calculations have been performed using molecular, Michel and normal optical potentials to analyze the angular distributions of cross sections for 12 transitions populating the 0.0, 0.709, 1.454, 1.974, 2.538, 2.72, 2.84, 3.02, 3.93. 4.62, 5.42, and 7.20 MeV states of P-30 via the (alpha...

Microscopic and macroscopic distorted wave Born approximation calculations have been performed using molecular, Michel and normal optical potentials to analyze the angular distributions of cross sections for 12 transitions populating the 0.0, 0.709, 1.454, 1.974, 2.538, 2.72, 2.84, 3.02, 3.93. 4.62, 5.42, and 7.20 MeV states of 30P via the (α,d) re...

The point stressed by Michel and Reidemeister is that the Michel potential in our work is not final and an adjustment of the parameter α gives an elastic distribution and a potential similar to that obtained for the molecular one. This is usual in the absence of the elastic data at large angles as commented on by Tariq et al. [Phys. Rev. C 59, 2558...

Full finite-range distorted-wave Born approximation calculations have been performed using molecular, Michel, and normal optical potentials to analyze the angular distributions of cross sections for the 53 transitions populating the bound and unbound states of 28Si via the (α,t) reaction. The parameters of these three potentials have been determine...

Full finite-range distorted-wave Born approximation calculations have been performed using molecular, Michel, and normal optical potentials to analyze the angular distributions of cross sections for the 53 transitions populating the bound and unbound states of Si-28 via the (alpha,t) reaction. The parameters of these three potentials have been dete...