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arXiv · 1112.2732

Phenomenological model for predicting the energy resolution of neutron-damaged coaxial HPGe detectors

C. DeW. Van Siclen·E. H. Seabury·C. J. Wharton·A. J. Caffrey
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Abstract

The peak energy resolution of germanium detectors deteriorates with increasing neutron fluence. This is due to hole capture at neutron-created defects in the crystal which prevents the full energy of the gamma-ray from being recorded by the detector. A phenomenological model of coaxial HPGe detectors is developed that relies on a single, dimensionless parameter that is related to the probability for immediate trapping of a mobile hole in the damaged crystal. As this trap parameter is independent of detector dimensions and type, the model is useful for predicting energy resolution as a function of neutron fluence.

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C. DeW. Van Siclen, E. H. Seabury, C. J. Wharton, A. J. Caffrey. 2011-12-12. Phenomenological model for predicting the energy resolution of neutron-damaged coaxial HPGe detectors. https://doi.org/10.1109/tns.2012.2209896

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