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

Volume

37

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

1248

Lastpage

1253

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;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.57374

Filename

57374