Experimental searches for rare alpha and beta decays P. Belli, R. Bernabei, F. A. Danevich, A. Incicchitti and V. I. Tretyak Eur. Phys. J. A, 55 8 (2019) 140 Published online: 29 August 2019 DOI: 10.1140/epja/i2019-12823-2