A5085088176- Nuclear physics research studies
- Astronomical and nuclear sciences
- Nuclear Physics and Applications
- Radioactivity and Radon Measurements
- Atomic and Molecular Physics
- Nuclear and radioactivity studies
- Radiation Detection and Scintillator Technologies
- Advanced Radiotherapy Techniques
- Particle accelerators and beam dynamics
- Neutrino Physics Research
- Radioactive contamination and transfer
- Quantum Chromodynamics and Particle Interactions
- Astro and Planetary Science
- Radiation Dose and Imaging
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- Radiation Shielding Materials Analysis
- Particle physics theoretical and experimental studies
- Inorganic Fluorides and Related Compounds
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Geochemistry and Geologic Mapping
University Frères Mentouri Constantine 1
2010-2022
University of Constantine 3
2005-2013
Université Constantine 2
2004-2008
Centre de Gestion Scientifique
1993
Université Claude Bernard Lyon 1
1983-1993
Centre National de la Recherche Scientifique
1991-1993
Institut National de Physique Nucléaire et de Physique des Particules
1984-1993
State University of New York
1993
Université Joseph Fourier
1992-1993
Institut de Physique
1983-1993
The addition of inorganic fertilizers to treat crop soil and increase its production has become a necessity tool used around the world. These contain different quantities uranium thorium. Therefore, tons radionuclides from natural radioactive series U238, U235 T232h are dispersed in environment due high use fertilizer agriculture. In this work, radioactivity levels were determined two fertilized unfertilized samples collected at various depths Algerian agricultural region El-Athmania Mila,...
The β decay of the neutron-rich nuclei K51−53 has been used to populate bound and unbound states in Ca50−53. Measurements γ rays as well β-delayed neutrons enabled detailed schemes be established levels identified 50−53Ca. A delayed one-neutron emission probability P1n 63±8% was determined for K51. total seven new transitions were observed following K51, 25 neutron branches found that enrich level scheme Ca51. Delayed probabilities P1n=74.4±9.3% P2n=2.3±0.3% K52, 12 Ca50,51,52. Three Ca52,53...
Azimuthal angle correlations have been measured for Li-Li pairs from $^{40}\mathrm{Ar}$ + $^{197}\mathrm{Au}$, $^{\mathrm{nat}}\mathrm{Ag}$, $^{\mathrm{nat}}\mathrm{Cu}$, $^{27}\mathrm{Al}$ (17A, 27A, and 34A MeV). Many of these exhibit enhancements at \ensuremath{\Delta}cphi 0\ifmmode^\circ\else\textdegree\fi{} 180\ifmmode^\circ\else\textdegree\fi{}, the classical pattern evaporation a hot, high-spin source. A very different is predicted by simple multifragmentation model, i.e., peak...
Properties of projectile fragments produced in peripheral and midperipheral collisions the reaction $^{40}\mathrm{Ca}$ + $^{\mathrm{nat}}\mathrm{Cu}$ at 35 MeV/nucleon were investigated using AMPHORA multidetector. A reconstruction primary projectilelike enabled simultaneous determination their excitation energy angular momentum. These quantities are good agreement with predictions simple macroscopic microscopic collision models. Partition between targetlike is discussed. The multiplicity...
In this study, the levels of natural and anthropogenic radioactivity in sediment samples, collected from Beni Haroun Dam, were investigated using gamma-ray spectrometry.The results obtained for 238 U, 232 Th series, 40 K element 137 Cs radionuclide are discussed.To evaluate radiological hazard absorbed dose rate, annual effective dose, radium equivalent activity Raeq, external internal indices Hex Hin calculated presented comparison with data different areas world.
The nuclear shell model is one of the successful models in theoretical understanding structure. If a convenient effective interaction can be found between nucleons, various observables such as energies states are accurately predicted by this model. basic requirements for calculations set single particle and two-body matrix elements (TBME) which construct residual nucleons. This latter could parameterized different ways. In study, we have used approach to improve existing USD type...
Building materials are classified as a source of hazardous contamination because their naturally occurring radionuclide content, mainly uranium and thorium families the radioactive isotope potassium. This can be related to natural composition on soil rocks. In order estimate harmful effects ionising radiations emitted by these materials, broad investigations radioactivity levels must established. this study, 31 samples different (sand, brick, ceramic, cement, clinker, flour gypsum) used in...
Systematic results are presented for multiplicity distributions of $^{1,2,3}\mathrm{H}$ and $^{3,4,6,8}\mathrm{He}$ produced in reactions $^{\mathrm{nat}}\mathrm{Ag}$ with $^{40}\mathrm{Ar}$ beams 280, 680, 1080, 1356 MeV. A variety gating conditions is explored classified connection the more peripheral or central collisions. Correlations between H-He Z angle projectilelike fragments follow qualitative expectations deeply inelastic scattering. Pairs light charged particles intermediate-mass...
In-plane and out-of-plane angular correlations have been measured between fragments of Z>3, Li fragments, $^{3,4}\mathrm{He}$, $^{1,2,3}\mathrm{H}$. The changing patterns for $^{40}\mathrm{Ar}$ induced reactions 7A, 17A, 27A, 34A MeV give an overview the decreasing importance mass-symmetric fissionlike at expense a broad range more mass-asymmetric breakups. Evidence is given that these come from central collision group similar violence which many combinations particles are ejected. Very...
Energy spectra of light charged particles have been measured in coincidence with fissionlike fragments using the 4\ensuremath{\pi} charged-particle detector AMPHORA. Preequilibrium, prescission, and postscission components emitted protons, deuterons, alphas extracted from energy a multiple source fit procedure. Including previously exclusive neutrons, complete data set for particle emission system $^{144}\mathrm{Sm}$${+}^{32}$S(26A MeV) is now available. Mass excitation an equilibrated...
Average transverse momenta have been carefully measured for \ensuremath{\alpha}-particle pairs at laboratory angles of 21\ifmmode^\circ\else\textdegree\fi{}, 31\ifmmode^\circ\else\textdegree\fi{}, 47\ifmmode^\circ\else\textdegree\fi{}, and 67\ifmmode^\circ\else\textdegree\fi{}. They exhibit small but distinct shifts different relative azimuthal \ensuremath{\Delta}cphi. Detection on the same side beam (\ensuremath{\Delta}cphi\ensuremath{\approxeq}24\ifmmode^\circ\else\textdegree\fi{}) yields...
The region in the vicinity of 132Sn, gathering numerous isotopes important masses, shows lots interests for explaining most interesting phenomena. It offers among others possibility to extract N-N empirical interactions so as test theoretical shell model description nuclear structure this region. researches on neutron-rich tin present anomalies a systematic variation various spectroscopic data such first 2+ excited state and reduced probabilities B(E2;2+? 0+). In order improve OXBASH which...
Activity concentrations of natural radionuclides in Boumerzoug River sediment (the main tributary Rhumel river) have been measured using high resolution HPGe detector. The activity the samples were range from 16.66±2.32 Bq/kg to 43.48±4.03 with mean value 26.64±1.33 for 226Ra, 20.01±1.98 32.71±3.85 25.95±1.46 232Th and 81.70±33.59 259.20±38.80 164.50±11.30 40K. These values used estimate radiation hazard indices. absorbed dose annual effective evaluated assess risk due use these sediments.
The spectra of odd-odd nuclides near drip lines, that are close to the path astrophysical r-process flow, involving a single particle or hole in vicinity an inert core provide detailed and quantitative information on N-N interaction. In this work, we have performed shell model calculation using recent experimental energies, by means Oxbash nuclear structure code, order reproduce properties 130In nucleus 132Sn mass region. two-body matrix elements (TBME) effective interaction were deduced...
The problem of the quantum description damping a 1D chain coupled oscillators with periodic boundary conditions in Markovian regime is solved. equations motion normal modes are derived, and evolution time their mean values variances explicitly studied. Furthermore, we investigate effect diffusion friction on dynamics chain. It shown that when off-diagonal elements tensors taken into account, most notable contribution these processes observed mode which all undergo an in-phase vibration.
We have performed shell model calculations by means of Oxbash nuclear structure code using recent experimental single particle (spes) and hole (shes) energies with valence space models above the 100sn 132sn doubly magic cores. The two-body matrix elements (tbme) original CD-Bonn realistic interaction are introduced after been modified taking into account three-body forces. focused our study on spectroscopic properties evaluation 130Sb, 132Te 134I nuclei, in particular their energy spectra,...
Abstract Many of the nuclei made temporarily during r-process nucleosynthesis are currently inaccessible to experiment. Their properties, however, help determine abundances stable elements which we observe in solar system. Beta decay half-lives and rates among most important these properties. Nuclei with 50 ≤Z≤ 56 82 ≤ N 88 π (gdsh) ⊕ν(hfpi) valence space above 132 Sn core lie on or close path astrophysical flow. The even-N neutron-rich isotopes classical “waiting point” A=130 system...
The research in the field of superheavy elements started sixties last century triggered by prediction a region enhanced nuclear stability at next closed proton and neutron shells beyond 208 Pb.Adam Sobiczewski was one first predicting numbers for these shell closures Z = 114 N 184, respectively.In following decades, extensive efforts led to synthesis isotopes up 118 fruitful competition leading laboratories with FLNR/JINR Dubna, Russia, LBNL Berkeley, USA, GSI Darmstadt, Germany most...