Pandey Suresh Chandra

Department of Physics, Mahatma Ghandhi Gramodaya Vishwavidyalaya, Chitrakoot, Satna M. P., India

Dubey Jay Prakash

Department of Physics, Dr. K. N. Modi University, Newai, Rajasthan, India

Upadhyaya Kripa Shankar

Department of Physics, Nehru Gram Bharati University, Allahabad, U. P., India