Saeed Hassan Saeed

Al-Hadba University College · Medical Instruments Technology Engineering

In this paper, we use maximum track length approach depending on track diameter-length (D-L) correlation as another way to estimate directly from empirical measurements of the track diameters or lengths without resorting to other methods. The lengths of the tracks have been extracted using the (D-L) correlation which relied on the measurement of th...

BACKGROUND: One of the most accurate and highly reproducible techniques is dual- energy x-ray absorptiometry (DXA). DXA device used to measure BMD, BMC, T-score, Z-score, and consequently used to measure fat mass (FM) and lean mass (LM) for different body sites such as arms, ribs, thoracic spine, lumbar spine, pelvis, legs and whole body. DXA techn...

The present paper aims to determine the bulk etch rate (VB) of the nuclear track detector LR115 type II using the track "length-diameter" (Le-D) measurement method. The detector was irradiated with energies 1.8, 2.47, 3.29 and 3.95 MeV of alpha particles under normal incidence. A 1uCi 241Am source emits alpha particles with the main energy of 5.485...

In this paper, a new treatment or method has been presented to calculate the parameters of the etched track and its shape development after irradiating polyallyldiglycol carbonate (PADC) detector CR-39 by alpha particles using direct measurement of the track opening diameters. The method is based on a concept that the track diameter growth rate (VD...

The aim of this paper is to determine the bulk etch rate Vb of the nuclear track detector CR-39 using the method based on measuring the thickness of the layer removed from the surface of the detector (the thickness difference) by the chemical etching, and then studying how to change it with the temperature of the etching solution to extract an empi...

The paper aims to propose the maximum track length (L max) measurement as an alternative approach to evaluate and extract the bulk etch rate (V b) of the nuclear detector PADC CR-39, and compare it with the results obtained by the removal layer thickness measurement of the etched detector. The alternative L max-method mainly relies on measuring the...

The effects of chemical etchant temperatures on the bulk etch rate V B of CR-39 SNTDs were investigated. The bulk etch rate is determined through direct measurement of "length-diameter Le-D" of alpha-particles track in the detector. Alpha-particles irradiations were made with energy of 2.5MeV under normal incidence radioactive source 241 Am of an a...

Radon (222Rn) is a naturally occurring radioactive gas with a half-life of 3.82 days, released from the normal decay of the elements uranium, thorium and radium in rocks and soil. It is an invisible, colourless, odourless and chemically inert gas and has no taste. Radon is fairly soluble in water and organic solvents and seeps up through the ground...

Effect of 40 kHz ultrasound (US) in chemical etching of alpha-particle tracks in CR-39 solid state nuclear track detector were investigated. Alpha-particle irradiations (using 1 µCi 241 Am source) were made with different energies under normal incidence. All track etch rates V D , V B , V T and V increased, but the critical angle of the detector θ...

The paper aims to study the effect of alpha particles on the electrical properties of MIS:Au-Ta 2 O 5-GaAs devices and on the electrical current transition mechanism. The devices are prepared by deposing a layer of gold with a thickness of 1000 Å by using the thermal evaporation method under a pressure of 10-5 torr to form the upper gate of the MIS...

In this work, the empirical parameterization describing the alpha particles’ track depth in CR-39 detectors is extended to describe longitudinal track profiles against etching time for protons and alpha particles. MATLAB based software is developed for this purpose. The software calculates and plots the depth, diameter, range, residual range, satur...

In this work, new empirical equation describing the charged particles radiation track development against etching time and track longitudinal depth are presented. The equation involves four free fitting parameters. It is shown that this equation can reproduce tracks depth formed on the CR-39 by alpha particles at different energies and etching time...

In this paper , the effect of an alternating electrical field strength on the tracks’ and ECE spots’ diameter density thickness 250μm which is made radiant by different energies of α-particles , that emitted from 241Am(1μCi) source has been studied . A system designed in the lab with high voltage 1400V within the frequency extent 1kHz- 1MHz and an...