channel) Pi:peak pulse height at the i-th reading n :total number of readings for 16 hours T ) +4 H ( D LT= 1.0 % I K E E H P +2 S I U R P T 0 5 10 15 I E TIME (h) N E O O T T -2 I H R P V T A -4 THBV4_0709EA Figure 7-9:Typical long-term stability of photomultiplier tube 7.2 Characteristics 165 There are
