Study on the reusability of fluorescent nuclear track detectors using optical bleaching

Fluorescent nuclear track detectors (FNTDs) based on Al${_2}$O${_3}$:C,Mg crystals are luminescent that can be used for dosimetry and detection of charged particles neutrons. These utilised imaging applications where a reasonably high density, approximately the order 1 $\times$ $10^4$ tracks in an area 100 $\mu$m$^2$, is required. To investigate reusability FNTDs applications, we present approach to perform optical bleaching under required density conditions. The was assessed through seven irradiation-bleaching cycles. For irradiation, studied FNTD exposed alpha-particles from $^{241}$Am radioactive source. performed by means ultraviolet laser light with wavelength 355 nm. Three dedicated regions single different accumulated densities conditions were investigated. After every cycle, signal-to-noise ratio calculated evaluate performance. It concluded reused at least times accumulation