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Detailed introduction
Classification of High Purity Germanium (HPGe) Radiation Detectors
ORTEC offers a variety of HPGe radiation detector solutions covering X-ray energies in the range of several hundred electron volts (eV) and gamma ray energies in the range of 10 MeV and above. These detectors are manufactured using P- and N-type high-purity germanium (HPGe). Both types of detectors are cryogenically cooled using liquid nitrogen or mechanical coolers.
How to choose the right HPGe radiation detector for your application
There are many criteria to consider when choosing the right detector for your specific application. The detectors required for a specific measurement cannot be determined from a single table or diagram. The energy range chart above and the key properties table below should be used when selecting a detector. You can click on the detector type link in the table below to get more details about that specific detector.
ORTEC also has several application-specific detectors and has the capability to design and manufacture specialized detectors. Select a link below for more details.
- Application-specific radiation detectors
- special detector
| FWHMresolution (inkeVas unit)@ Specify energy | |||||
| Detector series | Typical count | relative efficiency | 5.9 keV | 122 keV | 1332 keV |
| GEM | point source | 10-150 | Not applicable | 0.80-1.30 | 1.75-2.30 |
| Profile C | point source | 20-175 | 0.73-1.23 | 0.85-1.30 | 1.80-2.30 |
| Profile M | point source | 20-175 | Not applicable | 0.88-1.30 | 1.80-2.20 |
| Profile S | point source | 7-65 | 0.35-0.50 | 0.65-0.70 | 1.80-1.90 |
| Profile SP | point source | 7-50 | 0.30-0.43 | 0.59-0.63 | 1.80-1.90 |
| Profile F | point source | 7-60 | Not applicable | 0.65-0.85 | 1.80-2.10 |
| GMX | point source | 10-100 | 0.60-1.20 | Not applicable | 1.80-2.5 |
| GLP | point source | Not applicable | 0.17-0.39 | 0.48-0.60 | Not applicable |
| GWL | small volume source | 90-450ml | Not applicable | 1.20-1.40 | 2.10-2.30 |
| Application | The most suitable detector |
| synchrotron radiation research; softXRay research | GLP |
| Large environmental samples with complex spectra | GEM、GEM-F、GEM-M、GEM-C、GEM-S(low background recommended) |
| Environmental samples in filter media, disk or bottle form | GEM-F、GEM-C、GEM-S、GEM、GMX |
| small environmental samples | GWL(low background recommended) |
| High grade fissile material/Security | SGD、SGD-GEM |
| Neutron activation analysis | GMX(additional options recommended) |
| Post-accident monitoring | GEM(additional options recommended) |
| Compton Suppressed Gamma Spectroscopy Measurements | GMX |
| sea or air patrol | Micro-trans-SPEC、trans-SPEC-DX-100T、IDM-200-V |
| lung monitoring | GEM-S, Actinides-85 |
| Measurement of ray beams or near fast neutron fields | GMX(Dedicated internal heaters for in-situ neutron damage annealing are recommended) |
| waste analysis | Micro-trans-SPEC、trans-SPEC-DX-100T、GEM、GMX、GEM-C、GEM-S、IDM-200-V |
| freight/border security | Micro-Detective、Detective-EX、Detective-DX、Detective-200、IDM-200-P、IDM-200-V |
| In situ environmental spectrum analysis | Micro-trans-SPEC、trans-SPEC-DX-100T、GEM、GMX、GEM-C、GEM-S、IDM-200-V |
