Low background facility for ionizing radiation at LNE LNHB: Design and traceability J.M. Bordy, O. Khattabi, C. Chardeur, K. Lahlal and J. Plangnard EPJ Web Conf., 323 (2025) 11001 Published online: 07 April 2025 DOI: 10.1051/epjconf/202532311001