Standardisation of 18F using new portable 4πβ(LS) – λ coincidence detection system at ENEA-INMRI Farmesk Abubaker, Marco Capogni, Francesco Tortorici, Concetta Sutera, Francesco Pepe, Matteo Corbo, Pierino De Felice and Vincenzo Bellini EPJ Web of Conf., 290 (2023) 01001 Published online: 08 December 2023 DOI: 10.1051/epjconf/202329001001