1. Sikh National CollegeBanga 144505India
2. Department of Physics, Kanya Maha VidyalayaJalandhar‐144004India
3. Glass and Advanced Ceramics Division, Materials Group, Bhabha Atomic Research CentreTrombay, Mumbai‐400085India (Superannuated)
4. ENEA, C.R.Casacciavia Anguillarese 30100123 RomeItaly