The portable high-sensitivity dosimeter-radiometer is designed for search and detection of gamma-ray sources, measurements of the ambient dose equivalent of gamma radiation, flux density of alpha and beta particles with flat-contaminated surfaces, as well as for the rapid estimations of the specific activity of the radionuclide Cs-137 in the samples using Marinelli beaker with volume 0.5L.
Application
Description
Through the use of scintillation detector NaI(Tl) the device AT1125 has a high sensitivity and ability to react quickly to small variations of background radiation, also it allows to fulfill a dose measurements with high accuracy in a wide energy range of gamma radiation using the correction function "spectrum-dose" in the range 0.05 - 3 MeV.
The dosimeter-radiometer AT1125A additionally has a embedded Geiger-Muller counter, which significantly extends the range of measurement of ambient equivalent dose of gamma radiation.
The device has ability to implement the radiometric estimations of samples for radionuclide content using lead shielding in a laboratory and also for express test in the field field environment without any protective chambers.
Specification
External BDPS-02
Connection to notebook
Views
Measurements with marinelli beaker 0.5L
AT1125
AT1125А
BDPS-02
Type of detectors
NaI(TI) Ø25x40 mm
NaI(Tl)Ø25x40mm,
End-type Geiger-Muller counter tube
Geiger-Muller counter tube
Ambient gamma and X radiation dose
rate equivalent measurement range
30nSv/h - 300µSv/h
30nSv/h - 100mSv/h
0.1µSv/h - 30mSv/h
Ambient gamma and X radiation dose
equivalent measurement range
10nSv - 10mSv
10nSv -10Sv
0.1µSv ... 1Sv
Intrinsic relative error limit of dose rate and dose measurement
±15%
±15%
±20%
Energy range of registered X-ray and gamma radiation
50keV ... 3MeV
50keV ... 3MeV
20keV ... 3MeV
Flux density measurement range
- Alpha particles (BDPS-02)
- Beta particles (BDPS-02)
2.4-1E6 part./(min·sq.cm)
6-1E6 part./(min·sq.cm)
Maximum energy range of detected beta particles spectrum
155keV ... 3.54MeV
Sensitivity
to gamma radiation of Cs-137
to gamma radiation of Am-241
350 cps∙h/µSv
3800 cps∙h/µSv
350 cps∙h/µSv
3800 cps∙h/µSv
6.6 cps∙h/µSv
Radionuclide specific activity measurement range with 0.5L Marinelli beaker (Rel.error ± 20 %)
- with lead shield
- without lead shield
50 - 1E5 Bq/kg
100 - 1E5 Bq/kg
50 - 1E5 Bq/kg
100 - 1E5 Bq/kg
Count rate measurement range
<100kcps
<100kcps
Detection time of the source of Cs-137 with activity 10 kBq at 5 cm distance
<2s
<2s
Protection class
IP54
IP54
IP65
