Physics - Sciene

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:

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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

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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.

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