The CCRI News resource

The 2025 meeting of section III “neutron measurements” of the Consultative Committee for Ionizing Radiation was held at the head quarter of the International Atomic Energy Agency (IAEA), Vienna, Austria, from 9 to 11 July 2025 under the chair of Andreas Zimbal, PTB, Germany. About 40 participants, 7 of them connected remotely, discussed for 3 days the actual status and future developments in neutron metrology.

In addition to the discussions about finished, ongoing and planned comparison exercises, a huge topic was the further strategy of CCRI(III) concerning metrology of high energy neutrons with energies about 20 MeV. CCRI(III) decided to create a task group with the goal to prepare and organize a possible key comparison for high energy neutrons in the next two years.

A further topic was the discussion about the needs for neutron metrology in the growing field of Boron Neutron Capture Therapy (BNCT), which resulted in the proposal to organize a dedicated workshop in 2026, possible organized by NMIJ, to get a more profound overview of activities and scientific challenges related to this medical application of neutron radiation.

In addition to the presentations of the members of CCRI(III) about their progress and developments since the last meeting, four guest institutes presented their new engagement in neutron metrology, showing the worldwide growing demand in this fields. All four institutes were encouraged by the CCRI(III) to continue their activities and were invited to participate again as guests at the next meeting, which is planned to be held in 2027.