Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1876938 | Applied Radiation and Isotopes | 2009 | 4 Pages |
The thermal neutron flux can be easily measured in real time by using the scintillator with optical fiber (SOF) detector. However the irradiation damage under high-intensity neutron flux causes deterioration of the SOF detector due to radiation damage to the plastic scintillator in which 6LiF is blended. After irradiating the SOF detector for 4 h (thermal neutron fluence is approximately 2.0×1013 neutrons/cm2), the sensitivity of the SOF detector decreased by 3.0%. After irradiating the SOF detector for 2 months (thermal neutron fluence approximately 6.4×1014 neutrons/cm2), the sensitivity was reduced to 42% of baseline. Supposing that the thermal neutron fluence is 2×1012 neutrons/cm2 on the surface of a patient in a BNCT treatment, the sensitivity of the SOF detector is reduced by approximately 0.3%. This report presents investigations on the deterioration of the SOF detector in irradiation experiments.