Standardisation of 18F using new portable 4πβ(LS) – λ coincidence detection system at ENEA-INMRIFarmesk Abubaker, Marco Capogni, Francesco Tortorici, Concetta Sutera, Francesco Pepe, Matteo Corbo, Pierino De Felice and Vincenzo BelliniEPJ Web of Conf., 290 (2023) 01001DOI: https://doi.org/10.1051/epjconf/202329001001