From imaging to dosimetry: GEANT4-based study on the application of medipix to neutron dosimetry

An application of Medipix2 using a newly developed segmented multiple thickness polyethylene (PE) converter for fast neutron detection is presented. The system has the ability to provide an energy independent response for the dose equivalent for fast neutrons. The application of weighting factors to each defined thickness of PE allows for a flattening of the response of the detector system for dosimetry applications. Six PE converter segments were applied, and their thicknesses and weighting factors were optimised to obtain the required energy independent detector response. The study performed by means of GEANT4. Its suitability for neutron dosimetry was studied with respect to a previously published work. © 2013 Elsevier B.V.

Keywords

Neutron dosimetry, Polyethylenes, Fast neutrons, Radiation detectors, Thickness, Weighting functions

Citation

Othman, M. A. R., Marinaro, D. G., Petasecca, M., Guatelli, S., Cutajar, D. L., Lerch, M. L. F., Prokopovich, D. A., Reinhard, M. I., Uher, J., Janubek, J., Pospisil, S., & Rosenfeld, A. B. (2009). From imaging to dosimetry: GEANT4-based study on the application of medipix to neutron dosimetry. Poster presented to the 11th Neutron and Ion Dosimetry Symposium (NEUDOS-11), 11th - 16th October 2009. iThemba Laboratory for Accelerator-Based Sciences: Cape Town, South Africa. In Radiation Measurements, 45(10), 1355-1358. doi:10.1016/j.radmeas.2010.06.058