1. Department of Applied Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, India
2. Indus Synchrotron Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore - 452013, India
3. Department of Physics, Banaras Hindu University, Varanasi-221005, India
4. Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai – 400 094, India
5. Department of CMP & MS, Tata Institute of Fundamental Research, Mumbai-400005, India