Affiliation: | a Women College, P.O. Box 838, Dammam 31113, Saudi Arabia b Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia c Center for Applied Physical Sciences, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia d Radiation Protection Unit, Environmental Protection Department, Saudi Aramco, P.O. Box 13027, Dhahran 31311, Saudi Arabia |