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التقنين الاشعاعي البيئي للمياه الجوفية في غرب محافظة البصرة باستخدام تقنية التالق الحراري == Environmental Radiation Dosimetry of Groundwater in West of Basra Governorate using Thermoluminescence Technique
Author name:
سيف قاسم هلال
Supervisor name:
رياض جاسب ابو الهيل
General topic:
Physics
Specific topic:
Physics
Degree:
Master
University:
University Of Basrah - College Of Education For Pure Sciences
Language:
Arabic
University location:
Basrah
First pages:
26T1699 - p.pdf
Abstract:
This study includes calculation the dose rate of emitted gamma - rays from groundwater taken from different locations in the Basra govemorate by use of thermoluminescence technique . it emphasis on the the characteristics of TL - reader ,TL - dosimeter (calcium fluoride) to know the suitability of these systems for environmental monitoring. It is found that the zero dose reading for calcium fluoride is 0.18 m rad .It is also found that most dosimeters of the same materials have nearly equal sensitivities and that all thebatches have high uniformity which makes them capable for environmental use. Experimental observations have indicated that there is linear relation between response and dose for the material which qualifies it for measuring doses within the low dose range. The variations in the response of the TL - reader using internal light source have also been investigated ,it is found that TL - reader has high stability .The fading in a environmental field for calcium fluoride is 7% in one month.Making sure that these systems are suitable for environmental monitoring programing ,calcium fluoride has been used for measuring gamma - rays emitting from natural background radiation ,it is foundthat the natural dose rate of gamma - rays emitted from the locations : Albrjisiya, khor aizubair, Safwan, Jabal Sanam, Um Qasr, Um Eanij and Al - lahees are (5.80,6.41, 5.32, 5.25,5.26,4.60 and 4.86) μrad/h receptivity . Thus, the dose rate of radiation emitted From ground water of province of Basra is 5.35 μ rad/h . the results proved that the inhabited area ling within the environmental monitoring satiations are the area in which the radiation is natural and that the rate that the human being exposed equal 11.5μrad/h which considered naturalexposure limit.
