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Radiation Damage Effects by Electrons, Protons, and Neutrons in Si(Li) Detectors

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2 Author(s)
Liu, Y.M. ; Institute for Applied Technology National Bureau of Standards Washington, D. C. 20234 ; Coleman, J.A.

The degradation of performance of lithium-compensated silicon nuclear particle detectors induced by irradiation at room temperature with 0.6-MeV and 1.5-MeV electrons, l.9-MeV protons, and "fast" neutrons from a plutonium-beryllium [Pu-Be] source has been investigated. In general with increasing fluence, the irradiations produced an increase of detector leakage current, noise, capacitance, and a degradation in the performance of the detector as a charged-particle energy spectrometer. Following the irradiations, annealing effects were observed when the detectors were reverse-biased at their recommended operating voltages. Upon removal of bias, a continuous degradation of detector performance characteristics occurred. Detectors which had been damaged by electrons and protons exhibited a stabilization in their characteristics within two weeks after irradiation, whereas detectors damaged by neutrons had a continuous degradation of performance over a period of several months.

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Nuclear Science, IEEE Transactions on  (Volume:19 ,  Issue: 3 )