Characterization of a SrF 2 Scintillating Bolometer

We present the analysis of the data obtained with a 53 g SrF 2 scintillating bolometer operated at 20 mK. We have analyzed its heat and light response (time constants, linearity and energy resolution) and measured its scintillation relative efficiency factor for different particles (alpha, beta/gamma and neutrons). We have studied the spatial uniformity of the light output profiting from its internal contamination. The light amplitude of alphas from the delayed coincidence 224 Ra→ 220 Rn→ 216 Po (emitted from the same crystal position) shows a positive correlation, evidence of a non-uniformity that worsens the light signal energy resolution by more than 50%.