Natural Radioactivity of UAE Coastal Areas

الموضوعات

علوم بيئية

الملخص

Many materials that are usually found in the earth's crust contain small but measurable amount of naturally occurring radioactivity. In the present study, the natural radioactivity due to the presence of 238 U, 232 Th and 40 K in beach sand along the UAE costal line has been measured. The measurements were performed using gamma-ray spectrometry with a high-purity Germanium (HPGe) detector connected to a multi-channel analyzer. Chapter 1 includes an introduction about natural radioactivity, gamma ray spectrometry, types of detectors employed and analysis of gamma ray spectra. A literature review of the related work is also included at the end of this chapter. Chapter 2 explains the details of the experimental work. Collection procedure and treatments of the samples; and description of the measuring system are explained. Energy as well as efficiency calibration and background measurement methods are also described in this chapter. The results and discussion are presented in chapter 3. Factors affecting the measured gamma spectra such as volume of the sample container, detector resolution and the measuring time are firstly addressed. Determination of the specific activity of 238 U, 232 Th and 40 K in all samples are presented and discussed. Activity levels of 238 U, 232 Th and 40 K are found to be lower than the world average. The data, however, indicate higher natural radioactivity levels in region I (Abu Dhabi emirate) compared with that in region II (Northern emirates) and region III (Eastern Emirate). The total absorbed gamma dose rate in air in the beach area are found to be 23.08, 12.90 and 4.08 nGy/h in regions I, II and III respectively which is lower than the world average dose rate.

روابط وملفات

التعريف والنوع

رقم الوثيقة

eeb38192-ee75-4713-bda6-f9528f1a2d96

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

7708_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":" Salah A. Makhlouf","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Yaqoub Abdalla Mohamed Al-Ali","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Natural Radioactivity of UAE Coastal Areas

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

Salah A. Makhlouf

الإعداد

Yaqoub Abdalla Mohamed Al-Ali

الاقتباسات الببليوغرافية