Detector
NaI(Tl) volume 0.35 l, 76 x 76 mm (3”x3”), with bi-alkali PMT
Resolution better then 7.5% FWHM at 662 keV.
High voltage
Supply range 500 – 1000 V digitally controlled
Output
Positive impulses, rising time better then 0.5 μs
Amplitude linear range max +2.5 V
Bipolar Shaping, time constant 1 μs
Gain
Coarse gain: HV controlled
Fine gain: +/- 3 % in 1000 gain steps
Spectrum stabilization
Two point – offset and gain correction, 662 keV typ. at ch. 220
Precision +/- 0.1 ch.
ADC
Approximation, double buffered, high speed and high linearity
Conversion time 1.5 μs
1024 channels down sampled from 65535
Digitally adjustable ADC zero +/- 80 mV
Digitally adjustable LLD range from 2nd – 30th channel
Automatic Dead time correction, precision better 0.25%
Nonlinearity
Integral max 0.1% of full scale within 95% of range
Differential max 3% of full scale within 95% of range
Communication interface
USB
Reference source
137Cs - 9 kBq (0.25 μCi)
Power consumption
Power over USB, max 100 mA
Shielding
Lead, minimal thickness 85 mm, optionally steel
Environmental
Operating temperature range 0°C to +40°C
Storage temperature range -20°C to +70°C
Size and weight
HxWxD 770 mm x 360 mm x 620 mm
Weight 580 kg
Software requirements
Operating System Windows 2K, XP or Linux with
Kernel 2.6
Firebird SQL 2.0, Multiplatform (Windows, Linux)
FEATURES
• Sensitivity Accurately measure
the radioactivity in a given
sample utilising a high
sensitivity NaI(TI) scintillator.
Measurement sensitivity
0.02 Bq/g
• Multichannel Analyser Self
contained 1024 channel pulse
amplitude analyser
• Speed Full sample analysis in
only 5 mins
• Ease of use With little training
the operator can use the
graphic menu driven interface.
• Calibration Optimised
calibration eliminates long
calibration times.
• Integration All data stored in
multiplatform open source SQL
database to allow easy
integration into customer’s
own systems
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