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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)
M. Koenen ; Max-Planck-Inst. fur Chem., Mainz, Germany ; J. Bruckner ; M. Korfer ; I. Taylor
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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

Published in:

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