ORGANIC SCINTILLATOR FOR REAL-TIME NEUTRON DOSIMETRY.

Clicks: 327
ID: 97196
2018
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Abstract
We developed a radiation detector based on an organic scintillator for spectrometry and dosimetry of out-of-field secondary neutrons from clinical proton beams. The detector consists of an EJ-299-34 crystalline organic scintillator, coupled by fiber optic cable to a silicon photomultiplier (SiPM). Proof of concept measurements were taken with 137Cs and 252Cf, and corresponding simulations were performed in MCNPX-PoliMi. Despite its small size, the detector is able to discriminate between neutron and gamma-rays via pulse shape discrimination. We simulated the response function of the detector to monoenergetic neutrons in the 100 keV-0 MeV range using MCNPX-PoliMi. The measured unfolded 252Cf neutron spectrum is in good agreement with the theoretical Watt fission spectrum. We determined the ambient dose equivalent by folding the spectrum with the fluence-to-ambient dose conversion coefficient, with a 1.4% deviation from theory. Some preliminary proton beam experiments were preformed at the Bronowice Cyclotron Center patient treatment facility using a clinically relevant proton pencil beam for brain tumor and craino-spinal treatment directed at a child phantom.
Reference Key
beyer2018organicradiation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Beyer, Kyle A;Di Fulvio, Angela;Stolarczyk, Liliana;Parol, Wiktor;Mojzeszek, Natalia;Kopéc, Renata;Clarke, Shaun D;Pozzi, Sara A;
Journal Radiation protection dosimetry
Year 2018
DOI
10.1093/rpd/ncx255
URL
Keywords
lvr-15 neutron spectrometry reactor dosimetry si neutron filter stilbene

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