TY - JOUR AU - Bergeron, Denis AU - Cessna, Jeffrey AU - Fitzgerald, Ryan AU - Pibida, Leticia AU - Zimmerman, Brian AU - Michotte, Carine AU - Nonis, Manuel AU - Fenwick, Andrew AU - Ferreira, Kelly AU - Keightley, John C2 - Metrologia DA - 2018-01-01 DO - https://doi.org/10.1088/0026-1394/54/1A/06011 LA - en M1 - 54 PB - Metrologia PY - 2018 TI - Activity measurements of the radionuclides 18F and 64Cu for the NIST, USA in the ongoing comparisons BIPM.RI(II)-K4.F-18 and BIPM.RI(II)-K4.Cu-64 ER -