Answer Happy

the central anode of the proportional counter is a thin metal wire with diameter of -0.2 mm. What is the reason for this design difference?" [4] 12. A X5C dose rate meter can only measure dose rates up to 20 mSv/h, whereas a Thermo FH40GL dose rate meter can measure dose rates as high as 100 mSv/h. Both are gas-filled detectors. Which instrument employed as a proportional counter detector and which one is a GM-detector? Explain [4] 13. You have to determine the maximum stay-time in a radiation area where penetrating ionising radiation is present. What instrument should you use? A contamination monitor that displays counts per second, or A dose rate meter that displays in mSv/h or mSv/h. Gas Density I, W dE/dr пр ni (x10-4g/cm³) (eV) eV/pair (keV/cm) (ip/cm) (ip/cm) 2 0.8 15.4 37 0.34 5.2 9.2 1.6 24.6 41 0.32 5.9 7.8 11.7 15.5 35 1.96 10 56 13.3 1.2 31 2.26 22 73 8.4 21.6 36 1.41 12 39 17.8 15.8 26 2.44 29 94 34.9 14.0 24 4.60 22 192 Xe 54 54.9 12.1 22 6.76 44 307 CO₂ 22 18.6 13.7 33 3.01 34 91 CH₁ 10 6.7 10.8 28 1.48 46 53 Gas A(cm-¹Torr-¹) B(Vem-Torr) Da (x10-¹7 cm²V-1) He 0.11 3 34 H₂ N He N₂ 14 16 d 2 Ne 10 Ar 18 Kr 36