1. الرئيسية
  2. Thesis

Thesis

Simulation of Buildup Factor for Bremsstrahlung Produced by Complete Absorption of Beta Rays

        The Monte Carlo simulation method has been applied to generate the first data for bremsstrahlung buildup factor (BBUF) produced by the complete absorption of beta particles in different materials. The bremsstrahlung buildup factor was computed by the present method for different thicknesses of water, concrete, aluminum, tin and lead at the maximum bremsstrahlung energy of 2.2 MeV for 90Sr/90Y beta source.

إنجليزية

A Computational Investigation on Some Properties of a Gabor Lens

         A computational investigation has been carried out in some properties of Gabor lens with the aid of personal computer under the absence of space-charge effects.  This work has been concentrated on designing two concentric, electrostatic and magnetic lenses.  Electrostatic lens is a two-electrode immersion lens whose electrodes are cylindrical in shape separated by a separation distance.  Magnetic lens is a number of turns of the current-carrying coil of a hypothetical rectangular field of length L.The variable parameters of the electrostatic lens are th

إنجليزية

Determination of the Radioactivity in Soil and Water in Baghdad, Karbala and Basrah Samples

The aim of this project is to measure the uranium and radon gas concentrations in soil and water samples taken from regions situated in Baghdad, Karbala and Basrah, and to limit the level of contamination with radionuclides for these regions during the 2003 war.The first part contains the determination of uranium concentration in soil and water samples using CR-39 Track detector.

إنجليزية

DETERMINATION OF URANIUM CONCENTRATION IN HUMAN BLOOD SAMPLES IN SOME GOVERNORATES OF IRAQ BY USINGCR-39 TRACE DETECTOR

This study includes measurement of uranium concentration and calculates the specific activity in human blood samples (leukemia and health people) taken from some governorates of Iraq by using fission fragment track technique.The nuclear reaction used as source of uranium fission fragment is U-235 (n, f), obtained by the bombardment of U-235 with thermal neutrons from (Am- Be) source which has a flux of (5 x 103 n.cm-2.

إنجليزية

Studying x-ray atomic scattering form factor for K-shell and total atom for three and four electron systems

The partitioning technique has been used to analyze the three and four electron systems into three-pairs electronic wave functions for Li-like ions (Li, Be+, B++) and six-pairs electronic wave functions for Be-like ions (Li-, Be, B+) by using Hartree-Fock wave functions of Clementi and Rotti.In this work the atomic scattering factor f(s) for K-shell and total atom for three and four electron systems are studied.

إنجليزية

RELATIVISTIC COMPUTATION OF SOME SPECTROSCOPIC CHARACTERISTICS OF MEDIUM AND HIGH Z-ATOMS

A systematic study of the non-relativistic Hartree-Fock method and its relativistic version, Dirac-Fock method for the average of configuration have been presented. In the non-relativistic case, a fully derivation of the Hartree-Fock equations were presented and relativistic corrections (mass-velocity, Darwin and spin-orbit terms) are treated as first-order perturbation.

إنجليزية

Computer - Aided - Design Of Focused Ion Beam For a Lithography System

        A complete computer aided design (CAD) by using optimization methods for the ion optical systems have been developed, by mixing the dynamic programming procedure and artificial intelligence technique. The relative spherical and chromatic aberrations coefficients were obtained according to figure of merit for the following optimized optical systems:

إنجليزية

DESIGN AND ANALYSIS OF THE FOUR ELEMENTS OBJECTIVE LENS FOR THE 3.2-4.2µm SPECTRAL REGION

A series of sensors was developed to study the electromagnetic properties of a spark gap with various gaps between hm to 6mm. The gas used for the spark gap was air, at atmospheric pressure, ambient temperature ( 20°C ) and standard air composition. The sensors were developed to study the classical regions of the electromagnetic spectrum commonly called the visible, ultraviolet (W) , and near

إنجليزية

GAMMA-RAYS DETECTION OF RADIONUCLIDES IN HUMAN TISSUES

This study is carried out to detect and measure the specific activities of radionuclides in cancerous samples of human tissues that excised from Baghdad city patients. The measurements were done using spectral analysis  technique for gamma-ray with 2"×2" NaI(Tl) scintillation detector.Our present investigations are based on the study of 24 abnormal samples and 8 normal samples for comparing the results. These samples include four types of fresh tissues (kidney, colon, breast, and uterus) that may be obtained with great mass.

إنجليزية
المزيد