Radiation Protection Intercomparison Activity for N-60 and N-80 X-ray Beam Qualities: Results from SNSU-BSN Indonesia

Zufar Maulana Ihsan (National Measurement Standards (SNSU), National Standardization Agency of Indonesia (BSN), Jakarta, 12710)
Mutia Anggraini (National Measurement Standards (SNSU), National Standardization Agency of Indonesia (BSN), Jakarta, 12710)
Azwar Sabana (National Measurement Standards (SNSU), National Standardization Agency of Indonesia (BSN), Jakarta, 12710)
Muhammad Aminudin (National Measurement Standards (SNSU), National Standardization Agency of Indonesia (BSN), Jakarta, 12710)
Tutur Urip (National Measurement Standards (SNSU), National Standardization Agency of Indonesia (BSN), Jakarta, 12710)
Achmad Faturrahman Jundi (Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency (BRIN), South Tangerang, 15314)
Okky Agassy Firmansyah (Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency (BRIN), South Tangerang, 15314)

Jurnal Ilmu Fisika
Vol 18 No 2 (2026): September 2026

The Ionizing Radiation Metrology Laboratory of Indonesia’s National Metrology Institute participated in an international intercomparison of air kerma from the narrow-spectrum protection-level X-ray beam quality N-60 and N-80, as part of quality assurance efforts and preparation for expanding service scope. The measurements used X-ray beams based on the International Atomic Energy Agency (IAEA) Safety Report Series (SRS) No.16 for the N-60 and N-80 beam qualities, in accordance with ISO 4037, and under irradiation conditions specified by the intercomparison protocol from the Office of Atoms for Peace, Thailand (OAP). The air kerma rates measured from the experiments were used to determine the irradiation durations for the optically stimulated luminescence dosimeters (OSLDs). The results showed good agreement with the reference values. The mean air kerma deviated from the 2 mGy reference value by −0.63% for N-60 and −3.25% for N-80, both within the expanded measurement uncertainty of the laboratory (3.43% and 3.38%, k = 1.96). These results supported the laboratory’s technical competence in radiation protection measurements and provided a basis for expanding its calibration service scope.