Low Level Radioactivity Laboratory;
Kanazawa University;
Wake Tatsunokuchi;
Ishikawa 923-1224;
Japan;
Physics Department;
Faculty of Science;
South Valley University;
Kena;
Egypt;
Physics Department;
Faculty of Science;
Assiut University;
Assiut;
Egypt;
Physics Department;
Faculty of Science;
South Valley University;
Kena;
Egypt;