Bild: ORTEC
HPGe gamma detector
N-type coaxial HPGe detectors for gamma spectroscopy when low-energy response and neutron resistance are important.
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 | N-type coaxial HPGe1 |
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| Relative efficiency | 10–100%; higher on request1 |
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| Energy resolution at 122 keV | FWHM maximum limits 0.85–1.40 keV for GMX10–GMX100; model-dependent; optimal shaping with DSPEC-50A2 |
| Energy resolution at 1.33 MeV | FWHM maximum limits 1.8–2.5 keV for GMX10–GMX100; model-dependent; optimal shaping with DSPEC-50A2 |
| Resolution measurement conditions | Total system resolution measured at the factory at optimal shaping time with an ORTEC DSPEC-50A (per ANSI/IEEE Std. 325-1996)2 |
| Energy range | Approximately 5 keV–10 MeV1 |
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| Preamplifier | Resistive feedback as standard; optional PLUS transistor-reset preamplifier (-PL) for ultra-high count rates; optional remote preamplifier (-HJ, Streamline only, not compatible with -PL or -SMN)2 |
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| Endcap | Aluminium or carbon fibre options1 |
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| Cryostat configurations | PopTop or Streamline2 |
|---|---|
| Bias control | SMART-1 (-SMN), 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 |
| Entrance contact | 0.3 μm, ion implanted1 |
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The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.
12 models in the series. Filter or scroll the table to compare.
| Model | Relative efficiency2 | Typical energy resolution at 5.9 keV2 | Energy resolution at 122 keV2 | Energy resolution at 1.33 MeV2 | Peak-to-Compton ratio2 | Peak shape FW.1M/FWHM2 | Peak shape FW.02M/FWHM2 | Endcap diameter2 | Ordering configurations2 |
|---|---|---|---|---|---|---|---|---|---|
| GMX10 | 10 % (minimum) | 0.60 keV FWHM; not warranted | ≤ 0.85 keV FWHM | ≤ 1.8 keV FWHM | ≥ 40:1 | 1.9 (maximum) | 2.6 (typical) | 70 mm (nominal) | GMX10P4-70 (PopTop) / GMX10-70 (Streamline) |
| GMX15 | 15 % (minimum) | 0.64 keV FWHM; not warranted | ≤ 0.88 keV FWHM | ≤ 1.9 keV FWHM | ≥ 44:1 | 1.9 (maximum) | 2.6 (typical) | 70 mm (nominal) | GMX15P4-70 (PopTop) / GMX15-70 (Streamline) |
| GMX20 | 20 % (minimum) | 0.65 keV FWHM; not warranted | ≤ 0.88 keV FWHM | ≤ 1.9 keV FWHM | ≥ 48:1 | 1.9 (maximum) | 2.8 (typical) | 70 mm (nominal) | GMX20P4-70 (PopTop) / GMX20-70 (Streamline) |
| GMX25 | 25 % (minimum) | 0.69 keV FWHM; not warranted | ≤ 0.90 keV FWHM | ≤ 1.9 keV FWHM | ≥ 48:1 | 1.9 (maximum) | 2.8 (typical) | 76 mm (nominal) | GMX25P4-76 (PopTop) / GMX25-76 (Streamline) |
| GMX30 | 30 % (minimum) | 0.72 keV FWHM; not warranted | ≤ 0.90 keV FWHM | ≤ 1.9 keV FWHM | ≥ 52:1 | 1.9 (maximum) | 2.8 (typical) | 76 mm (nominal) | GMX30P4-76 (PopTop) / GMX30-76 (Streamline) |
| GMX40 | 40 % (minimum) | 0.76 keV FWHM; not warranted | ≤ 1.00 keV FWHM | ≤ 2.0 keV FWHM | ≥ 59:1 | 2.0 (maximum) | 3.0 (typical) | 76 mm (nominal) | GMX40P4-76 (PopTop) / GMX40-76 (Streamline) |
| GMX50 | 50 % (minimum) | 0.80 keV FWHM; not warranted | ≤ 1.10 keV FWHM | ≤ 2.2 keV FWHM | ≥ 58:1 | 2.0 (maximum) | 3.0 (typical) | 83 mm (nominal) | GMX50P4-83 (PopTop) / GMX50-83 (Streamline) |
| GMX60 | 60 % (minimum) | 1.10 keV FWHM; not warranted | ≤ 1.30 keV FWHM | ≤ 2.3 keV FWHM | ≥ 56:1 | 2.0 (maximum) | 3.0 (typical) | 95 mm (nominal) | GMX60P4-95 (PopTop) / GMX60-95 (Streamline) |
| GMX70 | 70 % (minimum) | 1.10 keV FWHM; not warranted | ≤ 1.30 keV FWHM | ≤ 2.3 keV FWHM | ≥ 60:1 | 2.0 (maximum) | 3.0 (typical) | 95 mm (nominal) | GMX70P4-95 (PopTop) / GMX70-95 (Streamline) |
| GMX80 | 80 % (minimum) | 1.10 keV FWHM; not warranted | ≤ 1.30 keV FWHM | ≤ 2.3 keV FWHM | ≥ 63:1 | 2.0 (maximum) | 3.0 (typical) | 95 mm (nominal) | GMX80P4-95 (PopTop) / GMX80-95 (Streamline) |
| GMX90 | 90 % (minimum) | 1.20 keV FWHM; not warranted | ≤ 1.40 keV FWHM | ≤ 2.4 keV FWHM | ≥ 64:1 | 2.1 (maximum) | 3.1 (typical) | 95 mm (nominal) | GMX90P4-95 (PopTop) / GMX90-95 (Streamline) |
| GMX100 | 100 % (minimum) | 1.20 keV FWHM; not warranted | ≤ 1.40 keV FWHM | ≤ 2.5 keV FWHM | ≥ 64:1 | 2.2 (maximum) | 3.2 (typical) | 95 mm (nominal) | GMX100P4-95 (PopTop) / GMX100-95 (Streamline) |
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)