An innovative technique for the investigation of the 4-fold forbidden beta-decay of 50V L. Pattavina, M. Laubenstein, S. S. Nagorny, S. Nisi, L. Pagnanini, S. Pirro, C. Rusconi and K. Schäffner Eur. Phys. J. A, 54 5 (2018) 79 Published online: 16 May 2018 DOI: 10.1140/epja/i2018-12515-5