1. Mangalore University, Department of Studies in Physics, Microtron Centre Mangalagangotri-574 199, India
2. Bhabha Atomic Research Centre, Radiochemistry Division Mumbai-400085, India
3. Bhabha Atomic Research Centre, Nuclear Physics Division Mumbai-400085, India
4. University of Pune, Department of Physics Pune-411 007, India
5. The M. S. University of Baroda, Physics Department Vadodara-390002, India