Emission characteristics of gadolinium ions in a water Cherenkov detector

Iwata, Yoshihiro   ; Sekiya, Hiroyuki*; Ito, Chikara   

In this work, we constructed an experimental setup based on time-resolved laser-induced luminescence spectroscopy to investigate the emission characteristics of Gd ions in water. The excitation laser wavelength was tuned in the range of 245-255 nm, and large resonant peaks were observed at 246.2 nm and 252.3 nm with measured emission lifetimes of around 3 ms. Good linearity was observed between Gd concentration and emission intensity for these two wavelengths, indicating that our setup is useful for remote monitoring of Gd concentration.