| Product Specifications |
| Detector |
|
Halogen-quenched “Pancake” GM tube |
|
| Type |
|
Pancake alpha, beta, gamma, and x-ray with thin pancake window |
|
| Radiation detected |
|
Alpha above 3.5 MeV, beta above 35 keV, gamma and x-ray above 6 keV |
|
| Applications |
|
• All purpose sensitive alpha, beta, and gamma and x-ray probe
• Nuclear medicine counter tops
• Detects leakage from diagnostic x-ray machines, especially mammography
• Geological surveys
• Scrap metal yards
• HAZMAT
|
|
| Typical background (shielded) | |
| Maximum exposure rate | |
| Nominal sensitivity to 1 mR/hr of 60Co | |
| Replacement GM tube part number | |
| Wall material |
|
Stainless steel with mica window |
|
| Wall thickness | |
| Window |
|
15 cm2 (1.75 in Ř) mica, 1.4 to 2.0 mg/cm2 |
|
| Active length | |
| Quenching gas | |
| Operating voltage | |
| Compatibility |
|
Compatible w/ all GM survey meters |
|
| Humidity range | |
| Operating temperature range |
|
- 65° to + 185°F (- 56° to + 85°C) |
|
| Pressure range | |
| Protective Screen |
|
Stainless steel, hexagonal pattern providing 89% open area |
|
| Construction |
|
ABS plastic housing and foam grip handle |
|
| Cable |
|
Shielded cord, approximately 4.5 ft long MHV coaxial connector or BNC connector |
|
| Dimensions |
| Detector housing: |
2.5 (w) x 4.25 (d) x 0.875 in (h) (6.36 x 10.8 x 2.2 cm) |
| Handle: |
1 in Ř x 6.25 in (d) (2.5 x 16.5 cm) (excluding connector) |
| Diameter of probe: |
2.6875 in (68 mm) |
| Length of probe: |
9.75 in (248 mm) |
|
| Weight | |
| Efficiency |
|
The GM Pancake Probe efficiency is shown below. In a recent performance check, the numbers shown represent typical results obtained: |
| 14C |
5% |
| 99Tc |
12% |
| 137Cs |
24% |
| 90Sr |
59% |
| 36Cl |
26% |
| 241Am |
8% |
| 129I |
2% |
| 230Th |
15% |
| 239Pu |
12% |
| NOTE: |
The efficiency formula used to calculate the % Efficiency is: Eff.%=(CPM x 100) / DPM |
|