Title :
Average pulse shape model for leading edge timing with Ge(Li) coaxial detector
Author :
El-Wahab, M.A. ; El-Arabi, A. ; Battrawi, M.H.
Author_Institution :
Fac. of Sci., Alexandria Univ., Egypt
fDate :
6/1/1990 12:00:00 AM
Abstract :
A model is presented for the prompt time-response from leading-edge triggering, where calculations are rendered simpler for uniform γ-irradiation of a coaxial Ge(Li) detector. Pulse shapes are formed at the timing filter amplifier output, from direct detector pulses. The average pulse-shape method is found responsible for some sort of walk compensation, and by displaying time-resolution vs. triggering fraction, one can predict the best FWHM with detection of an RC-filtered signal. It also shows the effect of the mixed filter time-constant on RMS noise. Taking account of both statistical and noise effects of FWHM, the statistical contribution increases to 7% at a 3 MeV detected energy
Keywords :
electron device noise; gamma-ray detection and measurement; pulse height analysers; semiconductor counters; γ-irradiation; FWHM; Ge(Li) coaxial detector; Ge:Li; RC-filtered signal; RMS noise; average pulse shape method; leading-edge triggering; mixed filter time-constant; noise effects; statistical contribution; time-resolution; time-response; timing filter amplifier output; triggering fraction; Coaxial components; Detectors; Filters; Gaussian noise; Noise reduction; Pulse amplifiers; Pulse shaping methods; Semiconductor device noise; Shape; Timing;
Journal_Title :
Nuclear Science, IEEE Transactions on
