PNNL X-coolerII-GEM120P4

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PNNL's HpGe X-cooler poptop detector

Model: GEM120P4

The above model number indicates that the detector has an efficiency of 120%, a resolution of 1.3 keV for 122 keV photons, resolution of 2.1 keV for 1.33 MeV photons, a peak to compton ratio of 86:1, and end cap diameter of 0.108 mm.

serial #: 44-TP41387A


GEM model => p-type => Usually a positive HV bias

GMX model => n-type => Usually a negative HV bias


2nCor_Equipment#PNNL_HpGe_X-cooler