Germanium Detector Categories - GEM and GAMMA-X Coaxial Germanium Detectors

Photon Detector Categories

Categories of Photon Detectors

ORTEC has the right photon detector for a wide range of x-and gamma-ray energies. See Fig. 12 for the energy ranges of the detectors discussed in this section.

GEM and GAMMA-X Coaxial Detectors

GEM and GAMMA-X (GMX) coaxial detectors maybe characterized by the following specifications:

Specifications	Coaxial Detector Type
• Relative Efficiency at 1.33 MeV	GEM and GMX
• Energy Resolution at: 1.33 MeV 122 keV 5.9 keV	GEM and GMX GEM GMX
• Peak-to-Compton Ratio at 1.33 MeV	GEM and GMX
• Peak Shape at 1.33 MeV FW.1M/FWHM FW.02M/FWHM	GEM and GMX
• ¹⁰⁹Cd 22-keV/88-keV Peak Area Ratio	GMX

The new PROFILE Series GEM detectors are characterized in terms of crystal dimensions being optimized for applications such as filter paper or Marinelli beaker counting.

Efficiency as a Function of Energy

Attenuation Effects

Relative Efficiency (at 1.33 MeV)

Relationship of Relative Efficiency to Active Volume

Energy Resolution

Energy Resolution as a Function of Energy

Energy Resolution as a Function of Temperature

Operation in Magnetic Fields

Peak-to-Compton Ratio

Peak Shape

22-keV Peak/88-keV Peak Area

Timing with HPGe Coaxial Detectors