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Radiation Protection Dosimetry Advance Access published online on October 19, 2004
Radiation Protection Dosimetry, doi:10.1093/rpd/nch411
Copyright © 2004 Oxford University Press.
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Received March 25, 2004
Revised September 10, 2004
Accepted September 19, 2004

SCIENTIFIC AND TECHNICAL PAPER

MEASUREMENT OF H'(0.07) USING THE PLASTIC SCINTILLATION PULSE HEIGHT WEIGHTING INTEGRATION METHOD

Liu Li-ye 1* and Ma Ji-zeng 1

1 China Institute for Radiation Protection, P.O. Box 120, Taiyuan 030006, China

* To whom correspondence should be addressed.
Liu Li-ye, E-mail: liuliye{at}tsinghua.org.cn


  Abstract

The pulse height weighting integration method for measuring H'(0.07) using a plastic scintillator has been developed through Monte Carlo simulations and laboratory tests. In order to design an optimal detector configuration, the parameters of input-window thickness and plastic scintillator thickness were investigated by EGS4 for their influences on the energy response for electrons. Based on the calculated deposited spectra in the plastic scintillator for electrons with various incident energies, a weighting function W(E), folded with the deposited energy spectra, was introduced in order to obtain a flat energy response in the low energy range. A constant response within ±3% was confirmed, by calculation, for electrons with energy >0.15 MeV. In addition, a preliminary experiment was performed using three beta sources (90Sr-90Y, 147Pm, 204Tl) and the energy response within ±6% for beta rays with the maximum energy >0.22 MeV was obtained. Some factors causing uncertainties in the measurements are also discussed in this article.


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