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Twelve samples of cigarettes have been collected from local markets of different types and origins by using (HPGe) detector, and measurement of the specific activity for series U238 and series Th232 in addition to K40 in order to estimate the health risk of cigarettes their by smokers, the results shown that highest specific activity value were be (12. 8±6. 3 Bq/kg, 8. 41±5. 8 Bq/kg, 125. 16±58. 3 Bq/kg), respectively, in the sample (MAC) MacBeth type cigarettes in Brazilian origin, this paper reports data such as (specific activity of K40, series U238, series Th232 and some parameters hazard indices) on the radioactivity of tobacco leaves so as to know contaminate those cigarettes in natural radioactivity and Suitability of its use by smokers.

In this work, measurements of indoor radon concentrations were completed for selected dwellings in Baghdad governorate using DURRIDGE RAD7 detector. The spectra measured by this detector demonstrated that, the radon concentrations were changed from 89 Bq/m 3 (Hay Ur district) to 191 Bq/m 3 (Al-Mansour district) with an average value of 123.3±24.3 Bq/m 3 which is below the recommended range (200-300 Bq/m 3 ) given by (ICRP, 2009). All other studied parameters such as EP, PAEC, AED and CPPP their values were less than or corresponding to the allowed worldwide average values.

In this study, the usual light source (Tungsten) used in the optical microscopy with intensity (924W/mm2) was changed to another light source (LED) of intensity 1049W/mm2). Eight pieces of the CR-39 (SSND) track detector with dimensions (1cm×1cm) and thickness (500μm) were irradiated with the Am-241 source, has radioactivity 12μci, for different irradiation times (30:30:270 sec) and direct contact with track detectors. After etched and drying the track detectors, they were read under the optical microscope (Pro-Way) before and after the source of light changed. The number of tracks in using the intensity of the Fluorescence and LED cases of lighting through the optical microscope was calculated using software via digital camera (HDEC-50B) through the calculator screen. The results showed an increase in the visibility of the track boundary with a significantly higher number of visible tracks.