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Radiation damage in large-volume n- and p-type high-purity germanium detectors irradiated by 1.5 GeV protons

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5 Author(s)
Koenen, M. ; Max-Planck-Inst. fur Chem., Mainz, Germany ; Bruckner, J. ; Korfer, M. ; Taylor, I.
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Excellent energy resolution makes germanium detectors prime candidates for gamma-ray spectroscopy in space missions. We present a study of several large-volume n-type and p-type high purity,germanium (HPGe) detectors that were damaged by 1.5 GeV protons and examine their performance as function of fluence, operating and anneal temperature, and time. n-type detectors exhibit essential advantages for space applications over p-type detectors. Annealing at about 110 K for both detector types was observed as well as resolution transients up to 134 K. We discuss the observed radiation effects with respect to existing models and show their limitations

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Nuclear Science, IEEE Transactions on  (Volume:42 ,  Issue: 4 )