1. Radiopharmaceuticals Division; Bhabha Atomic Research Centre, Trombay; Mumbai 400 085 India.
2. Homi Bhabha National Institute, Anushaktinagar; Mumbai 400 094 India.
3. Chemistry Division; Bhabha Atomic Research Centre, Trombay; Mumbai 400 085 India.
4. Solid State Physics Division; Bhabha Atomic Research Centre, Trombay; Mumbai 400 085 India.
5. Radiation Biology and Health Sciences Division; Bhabha Atomic Research Centre, Trombay; Mumbai 400 085 India.