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Chargui Y.,Unite de Recherche de Physique Nucleaire et des Hautes Energies | Trabelsi A.,Unite de Recherche de Physique Nucleaire et des Hautes Energies | Trabelsi A.,Center National des science et Technologies Nucleaires | Chetouani L.,University of Mentouri Constantine
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2010

We solve the DKP equation with a pseudoscalar linear plus Coulomb-like potential in a two-dimensional space-time. The problem is mapped into an effective quadratic plus inversely quadratic potential in a Sturm-Liouville type equation. The exact energy spectrum and the corresponding normalized eigenstates are obtained. The particular case of the DKP oscillator is also discussed. © 2010 Elsevier B.V. All rights reserved.

Chargui Y.,Unite de Recherche de Physique Nucleaire et des Hautes Energies | Chetouani L.,University of Mentouri Constantine | Trabelsi A.,Unite de Recherche de Physique Nucleaire et des Hautes Energies | Trabelsi A.,Center National des science et Technologies Nucleaires
Communications in Theoretical Physics | Year: 2010

Specific modifications of the usual canonical commutation relations between position and momentum operators have been proposed in the literature in order to implement the idea of the existence of a minimal observable length. Here, we study a consequence of this proposal in relativistic quantum mechanics by solving in the momentum space representation the Klein-Gordon oscillator in arbitrary dimensions. The exact bound states spectrum and the corresponding momentum space wave function are obtained. Following Chang et al. (Phys. Rev. D 65 (2002) 125027), we discuss constraint that can be placed on the minimal length by measuring the energy levels of an electron in a penning trap. © 2010 Chinese Physical Society and IOP Publishing Ltd.

Bejaoui J.,Center National des science et Technologies Nucleaires | Bejaoui J.,Tunis el Manar University | Bouhlel S.,Tunis el Manar University | Barca D.,University of Calabria | Braham A.,Direction Inventaire et Exploration Minerale
Estudios Geologicos | Year: 2011

The Fedj Hassène district is localized at the edge of the Tuniso-Algerian border 10 km of Ghardimaou area. It consists of a Zn-Pb vein type with minor amounts of Cu-As-Hg. The total Zn reserves are about 370.000t. The mineralization occurs within subparallel fractures to the Ain El Kohla ESE-WNW fault. Host rocks consist of limestones and marly limestones of the Middle Turonian. In the principal lode of Fedj Hassène, the mineralization occurs as vein filling of massive and brecciated brown sphalerite and minor galena ore with gangue. Other trace minerals are pyrite, chalcopyrite, orpiment, realgar, smithsonite and cerussite. LA-ICP-MS analyses in sphalerites show mean contents of 0,84 wt% Fe, 0,14 wt% Cd and 0,02 wt% Mn Ore. Fluid inclusions study in calcite and sphalerite reveals one mineralizing fluid characterized by an average salinity 23% wt NaCl with decreasing homogenisation temperature. In fact the temperature shows decrease from sphalerite to calcite. The fluid density that corresponds to trapping pressure ranges between 1.00 g/cm3 and 1.11 g/cm3 and pressure close to 200 bars. Microthermometric data in fluid inclusion hosted by gangue mineral presented by calcite show an average temperature of formation around 194C°. These inclusions homogenized to the liquid phase between 156C° and 210C° and salinities values ranging from 22 to 28 wt% NaCl and an average around 23% wt NaCl. The d34S (VCDT) values of sphalerite are in the range of + 4,6% to 6,4% (average=5,6%). Thermochemical reduction of Triassic sulfate by reaction with hydro-carbons is the most probable source for theheavy and the narrow range of the d34S values. Mineralogical, geochemical of trace elements, fluid inclusions and sulfur isotopes studies allow to include the vein-type ore field of Fedj Hassène in the polymetallic (Pb-Zn-As-Hg) vein mineralization of the nappe zone in northern Tunisia and north eastern Algeria.

Pruvost L.,French National Center for Scientific Research | Jelassi H.,Center National des science et Technologies Nucleaires
Journal of Physics B: Atomic, Molecular and Optical Physics | Year: 2010

In this paper we report on the analysis of the (6s1/2 + 6p 1/2)0-g weakly bound levels of Cs2 detected by photoassociation spectroscopy. We compare three methods of analysis: the use of the LeRoy-Bernstein formula, the use of the improved LeRoy-Bernstein formula and the use of the vibrational quantum defect. We show that the vibrational quantum defect method is more sensitive than the other methods and allows us to detect two deeply bound levels of the (6s1/2 + 6p 3/2)0-g potential, which are not detected by other methods. The binding energies of the levels are found to be 565.49 and 591.43 cm-1 below the (6s1/2+6p3/2) dissociation limit. © 2010 IOP Publishing Ltd.

Ben Abdelouahed H.,Center National des science et Technologies Nucleaires | Reguigui N.,Center National des science et Technologies Nucleaires | Abbes N.E.,Groupe Chimique Tunisien G.C.T.
Applied Radiation and Isotopes | Year: 2016

To determine residence time distribution (RTD) in the phosphate treatment reactor we apply radiotracer method. However this method becomes effective and profitable only if the radiotracer is the suitable one. The problem to resolve in our study is "which phase of the phosphate slurry our injected radiotracer is following?". For that we add radiotracer to the phosphate slurry and we proceed to phase separation using a filtration system. We follow simultaneously -using appropriate detectors- the behavior and the quantity of the radiotracer in both phases during the separation stage. The same experiment is applied twice using successively 99mTc and 131I radiotracers. The comparative study proves that 131I is more suitable than 99mTc for solid phase labeling of phosphate slurry. © 2016 Elsevier Ltd.

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