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| How to Choose the Right Semiconductor Photon Detector for Your Application |
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Choosing the correct detector for your specific application involves many criteria. No single table or graph can uniquely specify a detector for a particular measurement. The recommendations in our “How to Choose” are intended to guide a user to the detector likely to be best suited for the application.
Download the Guide
If you download and read the guide you will learn the relevance of all of the following in your application choice:
- N- or P-type?
- Detector size?
- Relative versus absolute efficiency?
- Resolution?
- Peak to Compton Ratio?
- Count rate limits?
- Low background detectors?
- Sample geometry?
. . . and much more
Germanium Detector Stocklist |
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GEM and Profile GEM Detectors
The majority of Gamma Spectroscopy applications, such as those found in counting laboratories, involve the energy range ~40 keV upward. ORTEC GEM and Profile Series GEM detectors are designed to cover this energy range. The Profile GEM –FX Series extends this lower energy cut off to 10 keV and above.
All GEM and Profile GEM Series detectors feature:
- Efficiencies to 150%, higher on request.
- Excellent energy resolution and peak symmetry.
- Specified crystal dimensions in Profile models.
- SMART bias options.
- Harsh Environment (-HE) option.
- Low background carbon fiber endcap options.
- PLUS preamplifier option for ultra-high-rate applications.
- Huge configuration flexibility, PopTop, Streamline and mechanically cooled options.
To assist in specification of the exact model GEM or Profile GEM required, two configuration guides are available.
Download the configuration guide for GEM models.
Download the configuration guide for Profile GEM models.
Germanium Detector Stocklist.
GAMMA-X (GMX) Detectors
GAMMA-X N-type coaxial HPGe detectors are made for high-performance gamma spectroscopy in the energy range ~3 keV and upwards.
GAMMA-X (GMX) detectors are coaxial Germanium (Ge) detectors with an ultra-thin entrance window. While most coaxial detectors have entrance windows from 500- to 1000-μm thick, the entrance window of these detectors is a 0.3-μm-thick, ion-implanted contact, extending the lower range of useful energies to around 3 keV. Ion implantation results in a totally stable contact which will not deteriorate with repeated cycling. Moreover, N-type HPGe detectors have been shown to be resistant to damage by fast neutrons.
GAMMA-X Series feature:
- GAMMA-X Efficiencies to 100%, higher on request.
- Spectroscopy from 3 keV upwards.
- Ultra-thin boron ion implanted radiation window, ideal for Compton suppression systems.
- Neutron damage resistant; user self-repair neutron damage option.
- Excellent energy resolution and peak symmetry.
- SMART bias options.
- Harsh Environment (-HE) option.
- Be window supplied with protective cover; Al or carbon fiber window option available at no additional charge.
- Low background carbon fiber endcap options.
- PLUS preamplifier option for ultra-high-rate applications.
- Huge configuration flexibility, PopTop, Streamline and mechanically cooled options.
To assist in specification of the exact model GAMMA-X required, a configuration guide is available.
Download the configuration guide for GAMMA-X models.
Germanium Detector Stocklist.
GWL "Well" Detectors
 ORTEC GWL Series High-Purity Germanium (HPGe) Well Detectors are a good solution for low level couting of small samples. The unique ion-implanted detector well has an ultra-thin dead layer (only 0.3 μm thick), and therefore provides the most extensive useful energy range (10 keV to 10 MeV). Unlike other Well detectors that have a hole all the way through the germanium crystal, ORTEC’s Well Detectors have a “blind hole” with at least 5 mm of active germanium at the bottom of the hole (image to right). This near 4 π geometry provides the maximum absolute counting efficiency available. The large well (1.55-cm diameter and 4.0-cm-long) accommodates an extensive range of sample sizes. Like all of ORTEC’s HPGe photon detectors, the HPGe Well detector may be stored or cycled repeatedly to room temperature without performance degradation.
GWL Series feature:
- Near 4 π geometry; high absolute counting efficiency for small samples.
- Spectroscopy from 10 keV to 10 MeV.
- Active Volumes to 400 cc.
- Unique ion-implanted blind well.
- Extra-large well (1.55 x 4.0 cm) standard.
Download the configuration guide for GWL models.
Germanium Detector Stocklist.
GLP and SLP Detectors
 GLP and SLP series fall within the category “low energy photon spectrometers”. These detectors feature planar or semi planar crystal geometry, which because of reduced capacitance, allows outstanding energy resolution at low energy. Each has a thin or ultra thin entrance window.
Typical applications are:
- GLP series: nuclear safeguards, x-ray diffraction.
- SLP series: energy dispersive x-ray analysis associated with electron microscopy.
Download the configuration guide for GLP models.
Download the configuration guide for SLP models.
Germanium Detector Stocklist.
| Special Application Detectors |
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PINS-GMX Portable Isotopic Neutron-Spectroscopy GAMMA-X Detector
The Portable Isotopic Neutron-Spectroscopy GAMMA-X (PINS-GMX) detector was created from a joint development of ORTEC and the Idaho National Engineering Laboratory* (INEEL) in response to the growing worldwide need to determine in situ the specific nature of the contents of a variety of containers of munitions or potential chemical weapons. Such applications require a detector with high resolution over a large range of energy, portability, neutron damage resistance, reliability, and ease of use. The performance of the PINS-GMX detector has been verified in real-world use by the U.S. Army.
Download the PINS-GMX Portable Isotopic Neutron Spectroscopy GAMMA-X Detector Data Sheet |
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ACTINIDE-85 Germanium (HPGe) Lung Monitor Detector
ACTINIDE-85 is a high-resolution, high-purity germanium detector designed specifically for lung burden and whole body counting applications. It is based on the PROFILE FX-85, which employs a proprietary thin radiation entrance window (~10 microns Ge equivalent), in order to maximize low energy efficiency.
Download the Actinide HPGe Lung Monitor Detector Data Sheet |
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High Performance Germanium (HPGe) Detectors for Safeguards and Non-Destructive Assay
The ORTEC Safeguards series include both coaxial and planar geometry detectors, specifically designed to meet the demands of the applications software used for isotopic ratio determination, have been developed to strike an optimum balance between low-energy resolution and high-energy efficiency.
Download the Safeguards GEM Detector Configuration Guide
Download the Safeguards Planar Detector Configuration Guide |
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PGM-1 Pipe Gage Monitor
The ORTEC Pipe Gage Monitor (PGM-1) is designed to monitor fluid/vapor density in nuclear reactor coolant piping. Other applications include activated corrosion products monitoring, activation analysis of sulphur in coal slurry, and and stack monitoring.
Download the PGM-1 Pipe Gage Monitor Data Sheet |
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SHP-1 Shallow-Hole Probe
The ORTEC Shallow Hole Probe (SHP-1) is designed for surveying shallow bore holes in and around mine and mill tailing dumps and land fills, formerly utilized nuclear materials facilities, and other waste management sites.
Download the SHP-1 Shallow Hole Probe Data Sheet |
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SPD-1 Submergible Photon Detector
The ORTEC Submergible Photon Detector (SPD-1) is designed for nuclear fuel element scanning in storage pools. The SPD-1 is useful in other simular applications that require a totally waterproof, submergible photon detector for shallow depth pools.
Download the SPD-1 Submergible Photon Detector Data Sheet |
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AWM-1 Actinide Wound Monitor
The ORTEC Model AWM-1 Actinide Wound Monitor is designed to accurately locate actinides embedded in body tissue, so that they may be removed surgically. The instrument’s design is based on specific suggestions from a leading radioisotope fabricating and reprocessing facility.
Download the AWM-1 Actinide Wound Monitor Data Sheet |
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