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email: akp@akp.kiev.ua
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SEG-002-“AKP-P” Semi-conductor gamma spectrometer Печать E-mail
seg002_pravka

Semi-conductor gamma-spectrometer SEG-002-“AKP-P”, made on the detector base from pure germanium, is designed for radionuclides identification in the compound isotopes mixture in counting samples, determination of their specific activity or abundance by spectrum of external gamma-emanation.

 

PURPOSE

Semi-conductor gamma-spectrometer SEG-002-“AKP-P”, made on the detector base from pure germanium, is designed for radionuclides identification in the compound isotopes mixture in counting samples, determination of their specific activity or abundance by spectrum of external gamma-emanation.


COMPOSITION

  • P-type semi-conductor gamma-detector on the HP(Ge) base in the Dewar container with preliminary amplifier and refrigerated input cascade.
  • Passive low-background composition detector shielding.
  • Spectrometry section.
  • ADC.
  • IBM compatible computer.
  • “AKWin” software.
  • Set of cables.
  • Nitrogen charge device.
  • Nitrogen level sensor.
  • Measuring vessels.


PERFORMANCE

 Gamma-type detection unit

  BDEG-35190

 Energy range of registered gamma-emission, keV

  40÷10000

 Registration efficiency, % to NaJ

  >35

 Energy resolution:

for 122 keV, eV

875

for 1.3 MeV, keV

1.9

 MDA by 137 Cs for 1 hour

for “Marinelli vessel” 1 l, Bq/kg

0.12

for “Denta” vessel 0.13 l Bq/kg

1.0

 Peak/Compton ratio

60:1

 Number of channels ADC, not less than

8192

 Integral non-linearity of conversion function, %

<0.05

 Differential non-linearity in % of full scale, %

<1

 Forming constant:

for heavy loads, ms

1

for light loads, ms

6

 Automatic voltage raising, V

0÷4000

 Thickness of passive shielding lead, mm

100

 Maximum “Marinelly” vessel volume, l

4

 Shield, protecting from K-alpha lead

copper, mm

0.1

cadmium, mm

0.1


DETECTOR TECHNICAL CHARACTERISTICS 
 

Model No

Effic.

(%)

Resolution

Peak-to- Compton 
Ratio 

Peak Shape

122 keV, 
(keV) 
1.33 MeV, 
(keV) 
FW.1M 
FWHM
FW.02M/ 
FWHM 

BDEG-35190

35

0,875

1,9

60:1

1,9

2,65

GEM35P4

35

0,85

1,85

60:1

1,9

2,6

  
APPLICATION  
 
A Coaxial HPGe Detector with Lead Shield is used to measure the specific gamma radiation of radionuclides from various types of environmental objects such as rocks, minerals, sludge, slag, soil, plant, sediment and particulate matter in air.  
 
FEATURES  
•  Adopting precision gamma-spectrometry methods;  
•  Radionuclide identification and determination of their specific activity;  
•  Low level of instrumental background;  
•  Low threshold for radionuclide detection;  
•  Separate and simultaneous measurement of activity of 100 radionuclides


 

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