Extensions of Natural Radioactivity to 4th-Type and of the Periodic Table to Super-heavy Nuclei: Contribution of Raj K Gupta to Cold Nuclear Phenomena. Journal title: Journal of Nuclear Physics, Material Sciences, Radiation and Applications Authors: BirBikram Singh, Sushil Kumar, Manoj K. Sharma, S. K. Patra Subject(s): Materials Science, Nuclear Physics, Radiation