1. Department of Physics; Sree Sevugan Annamalai College; Devakottai; 630 303; Tamil Nadu; India
2. Department of Physics; Karunya University; Coimbatore; 641 114; Tamil Nadu; India
3. Department of Material Science; IGCAR; Kalpakkam; 603102; Tamil Nadu; India
4. Reactor Operations Division; IGCAR; Kalpakkam; 603102; Tamil Nadu; India
5. CCCM; Baba Atomic Research Center; Hyderabad; 500 001; India