College of Science

      This work owes its importance to the fact that it aims at knowing and measuring the concentrations of alpha-particles emitters discrete by the human body in the urine in particular. Knowledge of these concentrations is extremely important since it reveals whether a person has received such doses of radioactive materials emitting alpha-particles that result in the occurrence of malignant tumor and mutations.

       The recent study deal with the structural and optical properties of Al 2O3 thin films prepared by the chemical spray pyrolysis technique at glass substrate(450°C) and studying the effect of annealing at different temperatures (500,550,600) °C on the optical properties.The results of X-ray diffraction showed that the prepared films are polycrystalline, the study of optical properties included the record of transmittance spectrum of the films with the wavelengths range from (300-900)nm, and then measuring the forbidden energy gap of electronic transitions w

     This research intents to design Bidirectional Converter that can be used in wide applications from uninterrupted power supplies (UPS),photovoltaic (PV) and battery charging and discharging system, to