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

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

2011-12-12

arxiv.org/abs/1112.2732v2

Physics

Instrumentation and Detectors

7 pages, 7 figures

Scientific paper

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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