The SS404 Al is a thin-crystal NaI(Tl) end-window scintillation probe designed to be an equivalent to the Mini 44A.
This probe incorporates a ∅ 1.3" x 0.1" (32 x 2.5 mm) thick NaI(Tl) crystal mounted on an aluminium window and is fitted with an internal 0.1" (3.15 mm) lead collimator to reduce background counts.
The SS404 Be is similar to the SS404 Al but is fitted with a beryllium window, which extends the low energy response down to 5 keV, making it suitable for counting 55Fe.
| Operating Voltage | Typically 650 V |
| Detector Crystal | ∅ 1" x 0.1" (32 x 2.5 mm) NaI |
| Energy Response |
Al= 15 keV - 250 keV |
| Housing Detector | MHV |
| Dimensions | ∅ 2" x 7" (54 x 185 mm) |
| Weight | 29 oz (820 g) |
| Temperature | -10°C to + 50°C |
Listed as percentage of 2π emission rate
| Nuclide | Energy | SS404 Al Efficiency | SS404 Be Efficiency |
| Fe-55 | 5.9 keV | 6.10% | 31.40% |
| Pu-238 | 16.3 keV | 98.70% | 99.10% |
| I-129 | 31.5 keV | 84.90% | 91.50% |
| Am-241 | 58.8 keV | 117.00% | 117.30% |
| Co-57 | 120 keV | 82.70% | 83.00% |
| Cs-137 | 662 keV | 17.00% | 18.30% |
| Co-60 | 1200 keV | 11.40% | 12.40% |
Documents
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Radiation-Monitors-US-Version-1.3
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