01/10 347 LB 444 K-40
48
irrelevant.
Figure 14: Plateau curve with Na I crystal (LB 5402)
Plateau LB 5430
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
560 660 760 860 960 1060
HV in V
cps
Setpoint of the HV control
Figure 15: Plateau curve with organic scintillator (LB 5430)
Plot the count rate vs. the high voltage, as shown in the diagram above.
If the count rate in the flattest part of the curve changes
a) by more than 5% per 100 V high voltage for the LB 5402,
b) by more than 15% per 100 V high voltage for the LB 5430,
the scintillation counter will operate unstable. The detectors or at least the crystal
0
2000
4000
6000
8000
10000
12000
14000
16000
500 600 700 800 900 1000 1100 1200 1300
HV in V
cps
To Next Page
Loading...
