The Annual Modulation Signature for Dark Matter: DAMA/LIBRA-Phase1 Results and Perspectives

Figure 10

Q.E. at peak and at 420 nm of each one of the 50 high Q.E. PMTs, installed in DAMA/LIBRA-phase2. The averages (RMS) are 38.5% (1.6%) and 35.1% (1.4%), respectively; the RMS show that the Q.E. spread in the PMTs production is well limited.