Sajid Husain

Department of Physics, Aligarh Muslim University, Aligarh, India

F. Rahman

Department of Physics, Aligarh Muslim University, Aligarh, India

Nasir Ali

School of Physical Science, Jawaharlal Nehru University, New Delhi, India

P. A. Alvi

Department of Physics, Banasthali University, Banasthali Vidyapith, Rajasthan, India