The CCRI News resource

A joint CCRI-IAEA workshop was held at the IAEA Headquarters in Vienna, Austria, from 7 to 8 July 2025. The focus of the meeting was to discuss the needs of high energy neutrons in various applications and how neutron metrology can address them, with the particular focus of finding available and suitable facilities in the world. The workshop attracted 93 participants (13 remotely) having interests in different fields related to high energy neutrons, who came together for 2 days filled with high level scientific presentations and extensive discussions. The topics of the presentations covered all fields in which high energy neutrons play an important role: space and aviation applications, radiobiology, high energy accelerator facilities, fast and high energy neutron facilities, metrology, reference standards, dosimetry, and instrumentation.

During the first day of the meeting, 18 presentations were given demonstrating the needs and challenges related to high energy neutrons. The second day was dedicated to more general overview talks, focused on facilities for the production of monoenergetic and broad neutron fields, on instrumentation and on nuclear data.

A clear result from the presentations and discussions was the worldwide need for standards for high energy neutrons and better access to well characterized facilities being able to produce quasi-monoenergetic and broad energy range neutron fields.

A report summarizing the conclusions is under preparation and will be published soon. The workshop was followed by a meeting of the Working Group 11 “high energy radiation fields” of EURADOS and the 2025 meeting of the Section III “neutron measurements” of the Consultative Committee for Ionizing Radiation. Both committees continued the discussions started during the workshop with special emphasis on their specific needs.