GBS Elektronik MCA-166 Influence of High voltage on HPGe detector resolution - Manual (Page 2)

0 1 00 0 2 00 0 3 0 00 40 00
B ia s V olta g e (V )
0
10 0 0
20 0 0
30 0 0
40 0 0
p
e
a
k
p
o
s
it
io
n
P h o to n E ne rgy
4 3 k eV
6 09 ke V
1 33 3 keV
Fig 2: Dependence of peak position (=signal amplitude) on bias
0 10 00 20 00 30 00 40 00
B ia s V olta ge (V )
0 .2
0.4
0.6
0 .8
1
E
ff
ic
ie
n
c
y
(
re
l.
t
o
m
a
x
.
b
ia
s
)
P h o to n E n e rg y
4 3 k e V
6 0 9 k e V
1 3 3 3 ke V
Fig 3: Dependence of detector efficiency on bias.
Conclusions
-The detector tested is only an example. Other detectors may behave different.
-It is worth the effort to test, if a 4 kV detector can also be operated at 3 kV
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