Related Experiment Video
Updated: Feb 3, 2026

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
Neutron and high energy photon fluence estimation in CLINAC using gold activation foils
Aim:
The thermal neutron, epithermal neutron and high-energy photon fluence were measured in this work around the Varian 21EX 23 MV CLINAC, which is operated in Albairouni hospital in Damascus, Syria.
Background:
Photoneutron measurements around medical CLINAC aim to protect both patients and staff from unwanted radiation.
Materials And Methods:
Neutron and photon activation techniques were applied using gold foils.
Results:
It was found that high-energy photons fluence has practically a constant value in the field size. The thermal and epithermal neutron fluence along ox and oy axes has the same order of magnitude.
Conclusion:
Gold foils have been used successfully to measure neutron flux and high-energy photons simultaneously using activation techniques.
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