Neutron measuring equipment
Model: SPECTRA
Photon-ionizing radiation sensitivity of (137Cs) CsI(Tl) scintillation detector: 400 cps/(µSv/h)
Upon customer’s request the sensitivity can be changed to a value of not less: 200 cps/(µSv/h)
Neutron radiation sensitivity while using the LiI(Eu) scintillation detector: 0.12 ± 0.012 pulse·cm2/n
– for thermal neutrons, not less: 1.2 ± 0.12
– for fast neutrons, not less: pulse·cm2/n
Total measurement and display range of photon-ionizing DER: 0.01 … 106 μSv/h
– from built-in scintillation detecting unit of photon-ionizing radiation: 0.01 … 50 μSv/h
– from built-in Geiger-Muller counter: 50 … 106 μSv/h
Measurement and display range of photon-ionizing DE from the Geiger-Muller counter 0.1 … 9.9·106 μSv
Display range of neutron radiation DER 0.01 … 104 μSv/h
Display range of count rate of photon-ionizing radiation 1 … 25 000 cps
Display range of pulse count rate of neutron radiation from the scintillation neutron detecting unit 0.01 … 25 000 cps
Main relative permissible error limit when measuring photon-ionizing radiation DER from the scintillation detecting unit of photon-ionizing radiation at 0.95 confidence probability (137Cs) (15+1/H*(10)) %,where H*(10) is a numeric value of measured DER in μSv/h
Main relative permissible error limit when measuring photon-ionizing radiation DER and DE from the Geiger-Muller counter at 0.95 confidence probability (137Cs) 15 %
Energy range of detected photon-ionizing radiation 0.02 … 3 MeV
Energy dependence of the device’s readings when measuring photon-ionizing radiation DER in the energy range from 0.05
MeV to 1.25 MeV relative to 0.662 MeV energy (137Cs) ± 25 %
Resolution of scintillation detecting unit of photon-ionizing radiation for 137Cs, not more 8 %
Energy range of detected neutron radiation 2.5·10-8 … 14 MeV
Set-up time of the device operation, not more 1 min
Calibration time by the level of gamma background 2 … 90 s
Response time to over 10 times change of photon-ionizing radiation DER 0.25 s
Operating supply voltage 3.7 V
Time of continuous operation of the device when powered from the charged lithium-polymer battery under background of gamma radiation not more than 0.5 μSv/h
– a switched-off display backlight, with no alarm triggering and a switched-off GPS receiver, not less: 200 h
– a switched-off display backlight, with no alarm triggering and a switched-on GPS receiver, not less: 55 h
Operating temperature range – 20 … + 50 °С
Dimensions of the device without a clip (with a clip), not more 67 × 128 × 30 (45) mm
Weight of the device, not more 0.28 kg
