Open Access
Table 1.
The main technical parameters of the GM tubes used.
| GM tube type |
ZP1200 |
ZP1210 |
|---|---|---|
| Supplier | Centronic | Centronic |
| Number of GM tubes in the experiment | 2 | 4 |
| Sensitive length (mm) | 38 | 140 |
| Sensitive diameter (mm) | 15 | 20 |
| Sensitive cross-area of one tube in the lateral direction (cm2) | 6 | 28 |
| Gamma dose rate range (mGy h−1) | 10−3–102 | 3 × 10−4–101 |
| Count rate at 10−2 mGy h−1 using Cs-137 source (sensitivity) | 28 | 110 |
| Operating voltage (V) | 500 | 500 |
| Photon sensitivity ratio (ZP1200/ZP1210) | 0.25 | |
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