1. Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi221005, India
2. Department of Chemistry, Institute of Science (Banaras Hindu University), Varanasi221005, India
3. Solid State Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai400085, India
4. Accelerator Physics and Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore452013, India
5. Training School Complex, Homi Bhabha National Institute, Anushakti Nagar, Mumbai400094, India
6. UGC-DAE Consortium for Scientific Research, Kalpakkam Node, Kokilamedu603104, India