1. Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkta-700064, India
2. Department of Physics, Panjab University, Chandigarh-160014, India
3. Physics Department, Vivekananda University, Belur, Howrah, West Bengal, India
4. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India