1. a School of Studies in Physics , Vikram University , Ujjain – 452001, India
2. b Physics Department , Government P. G. College , Rajgarh, Biaora – 465661, India
3. c Department of Chemistry , University of Allahabad , Allahabad – 211002, India
4. d Applied Spectroscopy Division , Bhabha Atomic Research Centre , Mumbai – 400085, India
5. e Indus Synchrotron Utilization Division , Raja Ramanna Center for Advanced Technology , Indore – 452013, India