Dr. Zahéra Mekkioui, Professor, Dept of Physics, University of Tlemcen, Algeria
E-mail: z_mekkioui@yahoo.fr

Dr. K. Maaz, Physics Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), Islamabad, PAKISTAN
E-mail: maaz@pieas.edu.pk

Dr. Sanjeev Kumar Gupta, Dept. of Physics, Michigan Technological University, Houghton, USA
E-mail: sanjeevg@mtu.edu

Dr. Rahul, Department of Physics & Electronics, Dr. R.M.L Avadh University, Faizabad-224001, India
E-mail: rhl.jaunpur@gmail.com

Dr. V. N. Meena Devi, Assistant Professor in Physics, Noorul Islam University, India
E-mail: vndevi@gmail.com