Abstract
Samples of blue scintillating fibres have been irradiated with thermal neutrons. The light yield and the attenuation length have been measured for a total integrated flux ranging from 3 to 60×10 13 neutrons cm −2, and for two different fluxes (3.5 and 35×10 9 neutrons cm −2 s −1). The long term damage has been investigated for 2 m long samples with uniform irradiation along the fibre. Sizable deteriorations both in light yield and in attenuation length are found even at our lowest integrated neutron flux.
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