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قياس مستوى الاشعاع الطبيعي في منطقة القبلة في محافظة البصرة == The Measurement of Natural Radiation Level in Qubla District in Basrah Governorate
Author name:
محمد قاسم خضير
Supervisor name:
عبد الرضا حسين صبر
General topic:
Physics
Specific topic:
Solar Energy Physics
Degree:
Master
University:
University Of Basrah - College Of Education For Pure Sciences
Language:
Arabic
University location:
Basrah
First pages:
26T1690 - p.pdf
Abstract:
The aims of this study is to measure the natural radioactivity in the selected areas from the province of Basrah using solid state nuclear tracks detectors SSNTDs both types of CR - 39 and LR - 115type Π to determine the concentration of radon gas. Gamma spectrometer Sodium Iodide NaI was used also to find specific activity of 238U, 232Th, 226Ra and 40K, in soil. This action is considered necessary from the point of view prevention of radiation hazard associated natural radioactivity of the soil in those areas and its impact on them. The first chapter includes an introduction to radiation and to shed light on the sources of radiation, natural and man made. Chapter 2 contains a highlight of radon gas and to identify the health effects of this gas as important sources of radiation in nature that can enter the human body through breathing. Chapter III contains the identification of the study area and samples collection of and preparation methods of the samples. The preparation of the measuring cylinder for measuring radon gas concentration at dwelling presented in the area. The natural gamma radioactivity measured by the NaI(Tl), also presented in the same chapter. This chapter also clarified; the equations used in calculations of radon gas concentration, the equations used to measure the specific activity of 238U, 232Th, 226Ra and 40K in selected soil samples taken from the area and assess the hazard indiceis caused by radioactivity (Raeq). Chpter 4, contains a review of methods used in the measurements includes materials and equipment used. Chapter five includes our findings from this study which is shows that, The radon gas concentration in dwelling has been measured found to be in the range of; 11.91 ± 1.3 Bq / m3 to 606.7 ± 66.52Bq / m3 with average value equal to 78.51Bq / m3, which is much less of the value specified by the United States Environmental Protection Agency EPA a 150Bq / m3 and this does not constitute a high risk to the health. The next part of this research; is the measurement of the natural gamma radiation emitted by the surface soil. We found that the lowest value for the concentration of isotope 226Ra is 2.5Bq / kg and maximum value was 147.4 Bq / kg with range of 47.3 Bq / kg. The minimum gamma concentration of 238U is 0.09 Bq/kg, while the maximum value is 94.7Bq / kg and an average of 23.5Bq / kg .The minimum concentration of 232Th is 1Bq / kg and maximum value of 83.9 Bq / kg at a range of 41.1Bq / kg. The minimum value of 40K was found to be 1 Bq / kg and the greatest value is 1048.6 Bq / kg and an average of 499.2 Bq / kg.All of these results are within the rangeof permitted and there is no rise in the value of the concentration of radioactive elements naturally calls for action to clean up pollution action cleaning , As for the soil of the region have indicated results found that the greater the intensity of the effects recorded in the soil of the area studied detector CR - 39 is 56187.5±3533.9 Track/cm2 while the lowest value was 1437.5±90.413 Track/cm2,which can be relied upon in radon concentration and content of radium account effective, but for the detector LR - 115TYPE it was found that the greatest density of the recorded Track 17250±1085 Track/cm2,while the less dense traces recorded Track 188±12Track/cm2 .
