1. Radiation and Photochemistry Division Bhabha Atomic Research Center Mumbai 400085 India
2. Department of Chemistry Savitribai Phule Pune University Pune 411007 India
3. K. K. Wagh College, (Present address), Pimpalgaon (B) Nashik 422209 India
4. Technical Physics Division Bhabha Atomic Research Centre Mumbai 400085 India
5. Homi Bhabha National Institute Mumbai 400094 India