Pure and Barium doped Cadmium Sulphide (CdS) thin films are grown by the chemical spray pyrolysis (CSP) technique. The films are characterized using X-ray diffraction (XRD), UV-VIS spectroscopy and Atomic Force Microscope (AFM). The XRD shows that pure and doped films are polycrystalline. The average grain of films was found to increase with Barium doping. The optical investigation shows a small decrease in bandgap value for the doped films. The pure and 2% and 4% Ba doped films were found to have a bandgap of 2.43eV and 2.5 eV respectively.

In this research, the more important spectral properties of vibration HSiI3 molecule have been studied and calculated by using the semi-empirical theoretical program (HyperChem) method (MNDO-PM3) (Use the RHF wave function for close - shell systems, the spins are paired). The calculated vibration modes for Triiodosilane (SiHI3) were nine modes in the region (63-1815) cm−1, which is located in the far and middle infrared region. Total energy, dipole moment, energy gap, Core-core repulsion, Ionization potential and electron affinity (E.A.) have been calculated. Other properties are also plotted in two and three dimensions, such as electrostatic potential and charge density. In addition, the values of the occupied and unoccupied molecular orbitals were calculated.

Nuclear waste in Iraq has three major sources; spent nuclear fuel from the old Iraqi Atomic Energy Organization in Al-Twitha site, waste from radioactive isotopes used in medicine and waste generated by the nuclear weapons used in the war against Iraq in 2003. These waste need to storage until becomes safety. Therefore in this study nuclear wastes (strontium oxides) were stored by vitrification methods in two types of borosilicate glass (glass and glass-ceramics) and the effect of beta ray on the immobilized waste was done. Then the physical, chemical and mechanical properties of borosilicate glass contain strontium oxide before and after irradiated by beta ray were investigated. It found that the leaching was not affected by beta-ray and neutrons.

The use of diesel fuel in diesel engines when they run produces large amounts of environmental emition due to the high flame tem temperature when combustion also high quantities of used lubricating oils produce annually, and the disposal process has caused serious enviro mental problems, so it must purify to use it again The aim of this preparation of emulsifier fuel from waste lubricating oil which have several advantages such as reduce the gases pollutants emulsion and invests the waste lubricating oilThe emulsifier fuel was prep rated from waste lubricating oil after simple physical treatments and surface active agent materials with water that necessary for preparation the emulsion ,the prepared fuel used in internal combustion engine It wase found that ,the optimum condition for preparation are :water percentage 10%,the concentrated of surface active agent 0.2% ,the time of mixing 2min, and the mixing rate 4000 rpm to produce the emulsion that more stable along time . It was found that ,the specific gravity for emulsifier fuel which has water 10% , 20% ( 0.8730, 0.8754) ,the rotational viscosity for the same emulsifier fuel was (23.5, 29.4) cp