GBS Elektronik MCA 166 - Manual (Page 45)

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3.11 Some examples for parameters of MCA used
with different detectors
This table shall just give an overview of possible settings useful with the MCA. It is far
from being complete. For actual settings with your detector, see the detectors manual.
Type Model Manufacturer HV (V) +
12
V -
12
V +
24
V -
24
V Input
signal
polarity Channels Gain for 2
MeV
full
range
Shap-
ing
time
(µs)
CdZnTe SDP/Z/60 Ritec +300 x x - - neg 1024 90 1
CdZnTe SDP/Z/20 Ritec +500 x x - - neg 1024 80 1
CdZnTe CZT500 Ritec +600 x x - - pos 1024 128 1
NaI Scintiblock Crismatec +500 pos 512 7.2 1
NaI 25825 Scionix +550 x x - - pos 512 90 1
NaI 72016
72000 Robotron
Messelektroni
k -800 neg 512 14 1
CsI Sc1010 Eurorad - x x - - neg 256 160 1
HPGe GMX-20190-
S Ortec -3000 neg 4096 18 2
HPGe GEM 15-190 Ortec +3000 pos 4096 24 2
HPGe GR 2018 Canberra -3000 neg 4096 11 2
HPGe GL 0310 Canberra -2000 x x x - neg 4096 2.3 2
Si
planar 7865S Ortec -1000 neg 4096 1.9 2
HPGe EGC 30-190R Eurisys -3000 pos 4096 52 2
HPGe EGPC 25-185 Eurisys +2000 neg 4096 35 2
3.12 Some of the most important photon energies
Isotope Half-life Energy (keV) Branching ratio (%)
Am241 432.2y 26.34/59.54 2.4/36
Cd109 462.6d 88.03 3.63
Bi214 19.9min, daughter
of Ra226 609.31 46.09
Ce139 137.64d 165.86 79.87
Co60 5.271y 1173.23/1332.49 99.85/99.98
Co57 271.8d 14.4/122.06/136.47 9.16/85.6/10.68
Cs137 30.07y 661.66 85.1
Eu152 13.3.y 121.77/344.28/778.91/
964.11/1112.07/1408.0
0 28.38/26.59/12.98/14.46/1
3.57/20.85
Hg203 46.61d 279.19 81.84
Mn54 312.2d 834.82 99.98
Pb214 26.8min, daughter
of Ra 226 241.91/295.09/351.86 7.46/19.17/37.06
Ra226 1600y 186.11 3.28
Sn113 115.09d 391.7 64.89
Sr85 64.84d 514.0 98.4
U235 7.04E8y 143.78/163.37/185.73/
205.33 10.53/4.7/53.15/4.7
Y88 106.65 898.04 94