4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
Paper Review: Initial screening in progress
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A comparison of neutron energy distributions unfolding codes used with a NE213 detector

Presented by Dr. Mark HERBERT on 6 Jul 2016 from 16:10 to 18:00
Type: Poster Presentation
Track: Track F - Applied Physics
Board #: F.428

Abstract

In fast neutron radiotherapy knowledge of how neutrons transfer energy into body tissue as they progress through the body is required. This knowledge is important to calculate the energy distributions of secondary charged particles, to characterize the radiation quality and absorbed dose both inside and near to the area under treatment. Experimental measurement or Monte Carlo transport codes can be used to determine neutron energy distributions.. Unfolding can be used for processing the measured data and obtaining the neutron energy distribution. The neutron energy distributions have to be unfolded from the measured pulse-height distributions, which is an ill-conditioned problem. Therefore, use of independent unfolding methods allows for comparison and interpretation of the data. This paper reports on the overall procedure of measuring and unfolding the fast neutron energy distributions with NE213 liquid scintillation detector using the unfolding codes Gravel based on the GRAVEL iterative method and MAXED based on the Maximum Entropy method. The results obtained from pulse height distributions using the different unfolding codes will be presented and discussed.

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Location: Kramer Law building
Address: UCT Middle Campus Cape Town
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