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HPGe gamma detector
Coaxial HPGe detector for safeguards, isotope-ratio determination and non-destructive assay of nuclear materials.
Download product sheet (PDF)All values with references – for tender documents
Specifications checked against the manufacturer’s documents on 2026-10-16
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.
| Detector type | HPGe, coaxial or semi-planar by SGD-GEM model1 |
|---|---|
| Crystal thickness | Minimum 15, 30, 50 or 60 mm, by model2 |
| Energy resolution at 122 keV | FWHM maximum limits 0.61–0.80 keV at 1 kcps and optimal shaping; model-dependent2 |
|---|---|
| Energy resolution at 1.33 MeV | FWHM maximum limits 1.7–1.8 keV at 1 kcps and optimal shaping; model-dependent2 |
| Models | SGD-GEM-3615P4, -5030P4, -5050P4, -6560P42 |
|---|---|
| Cryostat configurations | Fixed, portable or custom1 |
| Bias control | SMART-1 (-SMP), optional1 |
| Cooling and accessories | Cryostat and dewar or other cooling device required for operation; not included with the detector. A cryostat must be ordered with a Streamline detector.2 |
The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.
4 models in the series. Filter or scroll the table to compare.
| Model | Detector type1 | Crystal diameter2 | Crystal thickness2 | Energy resolution at 122 keV2 | Energy resolution at 1.33 MeV2 | Energy resolution at 122 keV, short shaping time2 | Energy resolution at 1.33 MeV, short shaping time2 | Endcap diameter2 | Ordering configurations2 | Relative efficiency2 |
|---|---|---|---|---|---|---|---|---|---|---|
| SGD-GEM-3615 | HPGe, coaxial or semi-planar by SGD-GEM model | 36 mm (nominal) | 15 mm (minimum) | ≤ 0.61 keV FWHM; at 1 kcps | ≤ 1.7 keV FWHM; at 1 kcps | ≤ 0.67 keV FWHM; at 30 kcps | ≤ 2.0 keV FWHM; at 30 kcps | 70 mm (nominal) | SGD-GEM-3615P4 (PopTop) / SGD-GEM-3615 (Streamline) | – |
| SGD-GEM-5030 | Semi-planar HPGe, SGD-GEM | 50 mm (nominal) | 30 mm (minimum) | ≤ 0.65 keV FWHM; at 1 kcps | ≤ 1.7 keV FWHM; at 1 kcps | ≤ 0.75 keV FWHM; at 30 kcps | ≤ 2.1 keV FWHM; at 30 kcps | 70 mm (nominal) | SGD-GEM-5030P4 (PopTop) / SGD-GEM-5030 (Streamline) | 13 % (nominal) |
| SGD-GEM-5050 | Coaxial HPGe (SGD-GEM) | 50 mm (nominal) | 50 mm (minimum) | ≤ 0.75 keV FWHM; at 1 kcps | ≤ 1.8 keV FWHM; at 1 kcps | ≤ 0.89 keV FWHM; at 30 kcps | ≤ 2.1 keV FWHM; at 30 kcps | 70 mm (nominal) | SGD-GEM-5050P4 (PopTop) / SGD-GEM-5050 (Streamline) | 20 % (nominal) |
| SGD-GEM-6560 | HPGe, coaxial or semi-planar by SGD-GEM model | 65 mm (nominal) | 60 mm (minimum) | ≤ 0.80 keV FWHM; at 1 kcps | ≤ 1.8 keV FWHM; at 1 kcps | ≤ 0.96 keV FWHM; at 30 kcps | ≤ 2.2 keV FWHM; at 30 kcps | 83 mm (nominal) | SGD-GEM-6560P4 (PopTop) / SGD-GEM-6560 (Streamline) | 50 % (nominal) |
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.
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ORTEC (AMETEK)