Rashmi Yadav

Department of Physics, Banasthali Vidyapith, Rajasthan (INDIA)

Pyare Lal

Department of Physics, Banasthali Vidyapith, Rajasthan (INDIA)

F. Rahman

Department of Physics, Aligarh Muslim University, Aligarh, UP (INDIA)

S. Dalela

Department of Pure and Applied Physics, University of Kota, Kota, Rajasthan (INDIA)

P. A. Alvi

Department of Physics, Banasthali Vidyapith, Rajasthan (INDIA)