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17 List of publications In Journals Renu Gupta, V. Kumar, P.K. Goyal, Shyam Kumar, Optical Characterization of Poly(methyl methacrylate) implanted with low energy ions, Appl. Surf. Sci., 2012 (Accepted). Renu Gupta, V. Kumar, P.K. Goyal, Shyam Kumar and Sneh Lata Goyal, Thermal and Electrical behaviour of 100 kev N+ and Ar+ ion implanted Poly( methyl methacrylate) (PMMA) polymer, Adv. in Appl. Sci. Res., 2012 (Accepted). Renu Gupta, V. Kumar, P.K. Goyal, Shyam Kumar, P. C. Kalsi and Sneh Lata Goyal, Effect of γ- irradiation on thermal stability of CR-39 polymer, Adv. in Appl. Sci. Res., 2011, 2(1), Renu Gupta, V. Kumar, P.K. Goyal and Shyam Kumar, Thermogravimetric analysis of heat treated CR-39 polymer, J. Chem. Pharm. Res., 2010, 2(4): Nidhi, Renu Gupta, Tanu Sharma, Sanjeev Aggarwal and S Kumar, Effect of thermal annealing on optical properties of CR-39 polymeric track detector, Indian J. Phys. (2009) 83(7), V. Kumar, P.K. Goyal, Renu Gupta and Shyam Kumar, Tuning of refractive index and optical band gap of CR-39 polymer as an effect of heating, Rad. Eff. and Def. in Solids, 2011, 166(2), P. K. Goyal, V. Kumar, Renu Gupta, S. Mahendia, Anita and S. Kumar, Modification of Polycarbonate Surface by Ar+ Ion Implantation for Various Opto-electronic Applications, Vacuum, 30 (2011) 1-5. P. K. Goyal, V. Kumar, Renu Gupta, S. Mahendia, T. Sharma and S. Kumar Change in the Electrical conductivity of N+ Ion Implanted Polycarbonate, Adv. in Appl. Sci. Res., 2011, 2 (3),