Enhancing the radiation dose detection sensitivity of optical fibres.
作者： D.A. Bradley , G. Amouzad Mahdiraji , M. Ghomeishi , E. Dermosesian , F.R.M. Adikan
DOI: 10.1016/J.APRADISO.2014.12.005
关键词:
摘要: Abstract A method for improving the thermoluminescence (TL) yield of silica-based optical fibres is demonstrated. Using silica obtained from a single manufacturer, three forms pure (undoped) fibre (capillary-, flat-, and photonic crystal (PCF)) two Ge-doped (capillary- flat-fibre) were fabricated. The samples exposed to 6 21 MeV electrons, doped 6 MV photons. consistent observation large TL enhancement strongly suggestive surface-strain defects generation. For 6 MeV irradiations flat-fibre PCF, respective yields per unit mass about 12.0 17.5 times that undoped capillary-fibre have been observed. Similarly, by making into flat-fibre, response found increase some 6.0 times. Thus, in addition presence dopant, fused surface areas flat-fibres PCF seen be further important source TL. glow-curves analysed computational deconvolution. Trap centre energies estimated compared various samples. Two trap types observed are also PCF. An additional one when capillary fibre. These elevated-energy centres linked with strain-generated collapsed regions flat
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