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Параметры и характеристики .
HARD BETA and GAMMA GM DETECTORS
GENERAL SPECIFICATIONS
| Parameters | SBM-20 / SBM-20U |
| Gas Filling | Ne + Br2 + Ar |
| Cathode Material | Stainless Steel, 50 mkm |
| Maximum Length (mm) | 108 / 101 |
| Effective Length (mm) | 91.0 / 83.5 |
| Maximum Diameter (mm) | 11 |
| Effective Diameter (mm) | 10 |
| Connector | Pin |
| Operating Temperature Range 0C | -60 to +70 |
WALL SPECIFICATIONS
| Parameters | SBM-20 / SBM-20U |
| Areal Density (mg/cm2) | 40 |
| Thickness (mm) | 0.05 |
ELECTRICAL SPECIFICATIONS
| Parameters | SBM-20 / SBM-20U |
| Minimum Anode Resistor (meg ohm) | 1.0 |
| Recommended Anode Resistor (meg ohm) circuit diagram | 5.1 |
| Recommended Operating Voltage (volts) | 400 |
| Operating Voltage Range (volts) | 350 - 475 |
| Initial voltage (volts) | 260 - 320 |
| Plateau length (volts) | at least 100 |
| Maximum Plateau Slope (%/100 volts) | 10 |
| Minimum Dead Time (at U=400V, micro sec) | 190 |
| Working range (mkR/s) | 0.004 - 40 |
| Working range (mR/h) | 0.014 - 144 |
| Gamma Sensitivity Ra226 (cps/mR/hr) | 29 |
| Gamma Sensitivity Co60 (cps/mR/hr) | 22 |
| Inherent counter background (cps) | 1 |
| Tube Capacitance (pf) | 4.2 |
| Life (pulses) | at least 2*1010 |
| Weight (grams) | 10 / 9 |
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