Agoha C.C.
Department of Geosciences, Federal University of Technology, PMB 1526 Owerri
Opara A.I.
Okereke C.N.
Onwubuariri C.N.
Emberga T.T.
Department of Physics and Industrial Physics, Federal Polytechnic Nekede, Owerri
Inyang G.E.
Ugwuegbu I.E.
Chilaka J.C
Department of Physics Industrial Physics, Imo State University, Owerri
Email: terhemba4sure@yahoo.com