Quest for two-proton radioactivity Deepika Pathak, Pardeep Singh, Hiteshwar Parshad, Harjeet Kaur and Sudhir R. Jain Eur. Phys. J. Plus, 137 2 (2022) 272 Published online: 25 February 2022 DOI: 10.1140/epjp/s13360-022-02354-x