Physics Department;
Faculty of Science;
King Abdulaziz University;
Jeddah;
Saudi Arabia;
Physics Department;
Faculty of Science;
Alexandria University;
Alexandria;
Egypt;
Nuclear Engineering Department;
Faculty of Engineering;
King Abdulaziz University;
Jeddah;
Saudi Arabia;
Physics Department;
Girls Faculty of Science;
King Abdulaziz University;
Jeddah;
Saudi Arabia;
Gamma; Spectrometry; Annual; Effective; Dose; External; Hazard; Index;