1. Microtron Centre, Department of Studies in Physics, Mangalore University, Mangalagangotri 574199, Karnataka, India
2. Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
3. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India
4. Physics Department, Faculty of Science, The M S University of Baroda, Vadodara 390 002, India
5. Accelerator & Pulse Power Division, Bhabha Atomic Research Centre, Mumbai 400 085, India