Conférences, Colloques, Séminaires, Symposiums: التقديمات الحديثة

الآن تُعرض المواد 21 -- 40 من 578

Nuclei structure around shell closure N = 82

Kaim, S (Université Frères Mentouri - Constantine 1, 2016-12-15)

The nuclei with A=140 having a few holes in the N =82 shell closure offer a fertile region to investigate the shape evolution. They are spherical or only slightly deformed in the ground state and at small angular momenta, ...
New calculation of L1 subshell yields fluorescence of heavy elements

Sahnoune, Y; Kahoul, A; Kasri, Y; Deghfel, B; Medjadi, D.E (Université Frères Mentouri - Constantine 1, 2016-12-15)

The analytical methods based on X-ray fluorescence have a great importance for a number of practical applications in a variety of fields including atomic physics, X-ray fluorescence surface chemical analysis, medical ...
Relativistic calculations of K-shell photoionization cross-sections for 16 𝟑𝟐 𝐒 at 59.6 keV excitation energy

Khalfallah, F; Kahoul, A; Kasri, Y (Université Frères Mentouri - Constantine 1, 2016-12-15)

In this work we calculate photoionization X-ray cross-sections of K-shell vacancies in S at incident photon energy of 59.6 keV using the Dirac-Fock method and the MCDFGME (Multi Configuration Dirac Fock and General Matrix ...
Relativistic K shell decay rates and fluorescence yield for Fe

Kahoul, A; Kasri, Y; Sahnoune, Y; Deghfel, B; Khalfallah, F; Sampaio, J. M; Marques, J. P (Université Frères Mentouri - Constantine 1, 2016-12-15)

In this work, we derive the K-shell fluorescence yield using a Dirac-Fock model. To compute, radiationless and radiative transition rates we have used the MCDF code of Desclaux and Indelicato [1- 3]. The wave functions ...
Calculations of Maxwellian Averaged capture Cross Sections Using the ENDF/B- VII.1, KADONiS, EXFOR and JEFF-3.1 evaluated nuclear reaction data libraries

Djerboua, Y; Amrani, N; Boucenna, A (Université Frères Mentouri - Constantine 1, 2016-12-15)

We calculate the Maxwellian-averaged cross sections (MACS) of the stellar nucleosynthesis reactions (n,g ) using the ENDF/B-VII.1, KADONiS, EXFOR and JEFF-3.1 evaluated nuclear data libraries. The calculated capture cross ...
DSC AND TEM STUDY OF TRANSFORMATION KINETICS AND PRECIPITATION IN TWO Al-Mg-Si ALLOYS WITH AND WITHOUT Cu AND EXCESS Si

SERRADJ, F; GUEMINI, R; BOUBERTAKH, A; HAMAMDA, S (Université Frères Mentouri - Constantine 1, 2013-12-16)

In this present research work, we have investigated the precipitation of two Al-Mg-Si alloys with and without Cu and excess Si by using the differential scanning calorimetry (DSC), transmission electron microscopic (TEM) ...
EFFECT OF AL DOPANT ON THE STRUCTURAL AND OPTICAL PROPERTIES OF ZnO NANOPOWDERS SYNTHESIZE BY SOL-GEL METHOD

ARAB, L; GUERGOURI, K; BERKANE, H (Université Frères Mentouri - Constantine 1, 2013-12-16)

Pure and Al doped zinc oxide nanopowders have been synthesized by sol-gel method. This method permit to obtain a very small grain size (23-36 nm), with grain size in undoped ZnO powder are larger than those Al doped ZnO ...
EXTENSION DU MODELE DE GANGHOFFER POUR LA SIMULATION DE LA PLASTICITE DE TRANSFORMATION DANS LES ACIERS

GACI, M; MEZIANI, S; FOUATHIA, A (Université Frères Mentouri - Constantine 1, 2013-12-16)

Le modèle numérique de Ganghoffer simule le phénomène de la plasticité de transformation dans les alliages ferreux, à l’échelle d’un grain. La comparaison de ce modèle avec les résultats expérimentaux, montre que cette ...
INSIDE ACTIVATES COMPLEX GOLD NANOPARTICLES FOR MEDICAL APPLICATIONS

TALOUB, SAMIR; HOBAR, FARIDA (Université Frères Mentouri - Constantine 1, 2013-12-16)

The optical scattering and absorption of gold nanorods (GNRs) depends on its size, shape, andsurroundings. This dependence is due to both intrinsic and extrinsic effects. A good understandingof this dependence is needed ...
SIMULATION DE LA CROISSANCE DES GRAINS DANS UN ACIER IF PAR UNE TECHNIQUE MONTE CARLO MODIFIÉE

AYAD, A; ROUAG, N; WAGNER, F (Université Frères Mentouri - Constantine 1, 2013-12-16)

Dans cette étude, nous présentons un modèle Monte Carlo modifié pour la croissance de grains dans un acier IF destiné à l’industrie de l’automobile. Nous avons introduit un concept original de prise en compte modulable ...
Effect of the heat treatment on the properties of Al doped ZnO thin films prepared by sol–gel technique

BOUKAOUS, C; TELIA, A; HORWAT, D (Université Frères Mentouri - Constantine 1, 2013-12-16)

In this work Al doped ZnO thin films were deposited on the silicium substrates by a dip coating sol–gel technique. The influences of annealing temperature on the structural and optical properties of aluminum doped ZnO ...
INFLUENCE OF TIG WELDING PARAMETERS ON THE MICROSTRUCTURAL AND MECHANICAL PROPERTIES OF AISI 430 FERRITIC STAINLESS STEELWELDS

BENSAID, N; BOUTAGHANE, A; TALA-IGHIL, N; BADJI, R; HADJI, M (Université Frères Mentouri - Constantine 1, 2013-12-16)

Ferritic stainless steels, in general, and the first generation of the group 430, in particular, are associated with many problems during the welding process. These problems are the grain growth, both in the fusion zone ...
PROPRIÉTÉS ET APPLICATIONS DES NANOPARTICULES NI/OXYDE INDUITES PAR RADIOLYSE

KEGHOUCHE, N; CHETTIBI, S; BENGUEDOUAR, Y; BOUDJENNAD, H; OUAFEK, N (Université Frères Mentouri - Constantine 1, 2013-12-16)

La maîtrise de la synthèse et la connaissance des propriétés des nanoobjets constituent un défi de nos jours. En effet, dans la matière divisée, des phénomènes nouveaux inexistants ou négligeables à l'état massif sont ...
CHROMIUM AND ALUMINIUM NITRIDE THIN FILMS DEPOSITED BY HiPIMS

FERREC, A; CAMUS, J; AIT AISSA, K; SCHUSTER, F; GANCIU, M; DJOUADI, M. A (Université Frères Mentouri - Constantine 1, 2013-12-16)

CrN is an excellent wear and corrosion resistant material. There is much interest in the research community to develop CrN thin films for coating tools for metal and wood machining operations [1,2]. Chromium nitride was ...
INFLUENCE DE L’EPAISSEUR ET LA TEMPERATURE DE RECUIT SUR LES PROPRIETES OPTIQUES DES COUCHES MINCES DE TIO2 DOPEES AU MERCURE (Hg), OBTENUES PAR LA METHODE SOL-GEL

ABBAS, F; BENSAHA, R (Université Frères Mentouri - Constantine 1, 2013-12-16)

Nous avons étudiés l’influence de l’épaisseur et de la température de recuit sur les propriétés structurales et optiques des couches minces de TiO2 dopées à 5% d’Hg, déposées sur des substrats en verre et en silicium. ...
INVESTIGATION OF SILICON NITRIDE COATING DEPOSITED BY PECVD FOR SOLAR CELL FRONT SIDE PASSIVATION

MEZIANI, S; MOUSSI, A; EL AMRANI, A; OUTEMZABET, R; MAHIOU, M (Université Frères Mentouri - Constantine 1, 2013-12-16)

Plasma Enhanced Chemical Vapor Deposition (PECVD) silicon nitride (SiNx:H, simply called SiNx) has been widely used in photovoltaic silicon solar cells as dielectric, because of low deposited temperature and compatibility ...
AB INITIO STUDY OF BULK AND SURFACE PROPERTIES OF CoPt L10 ALLOY

BRAHIMI, S; BOUZAR, H (Université Frères Mentouri - Constantine 1, 2013-12-16)

The CoPt binary alloy, due to its tetragonal L10 structure, shows a strong magnetic anisotropy, and is a good candidate for ultra high density informatics storage device. We present in this work ab initio calculations ...
FIRST PRINCIPLES CALCULATION STUDY OF STRUCTURAL, ELECTRONIC AND MECHANICAL PROPERTIES OF YM2 (M: Cu, Zn) LAVES PHASES

BENABADJI, M.K; FARAOUN, H. I (Université Frères Mentouri - Constantine 1, 2013-12-16)

Structural, electronic and mechanical properties of main YCu2 and YZn2 binary Laves phases with C14, C15, C36 and CeCu2 in Cu-Y-Zn alloy are investigated by firstprinciples calculations. The related total energies versus ...
ELABORATION ET CARACTÉRISATION D’UN MATÉRIAU A BASE DE ZIRCONE

LAHDIRI, OUAHIBA; YEFSAH, SAÏD (Université Frères Mentouri - Constantine 1, 2013-12-16)

Notre étude a mis en évidence de deux mécanismes d’action différents des dopants par la méthode des mélanges. Un mélange binaire de 63% ZrO2, 37%La2O3 et un mélange ternaire avec différents pourcentages de l’oxyde d’Indium ...
CORRELATIONS EFFECTS ON THE ENERGY BAND GAP IN HEUSLER ALLOY Ru2CrGe

BAHLOULI, S; AARIZOU, Z; ELCHIKH, M (Université Frères Mentouri - Constantine 1, 2013-12-16)

Magnetic and electronic proprieties of the ternary alloys Ru2CrGe have been studied using DFT calculation in conjunction with full potential Linear Muffin-Tin Orbital FPLMTO method. The conventional density functional ...

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