1. Department of Physics, Aarupadai Veedu Institute of Technology, Paiyanoor, 603 104 Chennai, Tamilnadu, India
2. Post Graduate and Research Department of Physics, Government Arts College, Tiruvanamalai 606603, Tamilnadu, India
3. Department of Physics, SSN College of Engineering, Kalavakkam, Chennai 603110, Tamilnadu, India
4. Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, Tamilnadu, India