Abstract
The effect of fast neutron damage on the energy resolution and the full energy peak efficiency (FEPE) of a 157 cm3 coaxial HPGe detector is studied. When the detector is subjected to approximately 5*108 fast neutrons, the energy resolution deteriorates from 1.85 keV to 11.65 keV at 1332 keV. The FEPE decreases by approximately 28% at 80.997 keV and approximately 8% at 1332 keV with a dose of approximately 4*108 fast neutrons. With the same dose of fast neutrons the total detection efficiency decreases by approximately 13%, and the peak to Compton ratio (for 1408.03 keV 152Eu peak) reduces to 11.7 from its original value of 70.6.
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