Performance
H. Specifications
Notes: For complete list of accessories, please refer to the
i
Matic Automatic
Alpha/Beta Counting System Super Spec Sheet.
Performance specifications are guaranteed at the Mirion Technologies
(Canberra) manufacturing facility.
Performance
BACKGROUND – Sample detector threshold set at 125 keV and guard detector
discriminator set at 10%.
Alpha: 0.08 cpm guaranteed, 0.05 cpm typical
Beta: 0.75 cpm guaranteed, 0.60 cpm typical
Note: Alpha background for 3.0 MeV to 9.6 MeV and Beta background for 125 keV
to 2.2 MeV.
EFFICIENCY
Guaranteed 50 mm efficiency:
241
Am: alpha 30.0%
90
Sr: beta 22.0%
Typical 4
π
efficiency:
Source
16 mm
25 mm
36 mm 50 mm
241
Am alpha
39.9%
39.5%
38.2%
33.8%
90
Sr beta
29.6%
29.3%
28.4%
25.1%
60
Co beta
12.0%
11.8%
11.5%
10.1%
Note: Efficiencies based on on a 2000 mm
2
area, 300
µ
m sensitive depth PIPS
detector.
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