A novel silicon microdosimeter using 3D sensitive volumes: modeling the response in neutron fields typical of aviation

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dc.contributor.authorTran, LTen_AU
dc.contributor.authorGuatelli, Sen_AU
dc.contributor.authorProkopovich, DAen_AU
dc.contributor.authorPetasecca, Men_AU
dc.contributor.authorLerch, MLFen_AU
dc.contributor.authorReinhard, MIen_AU
dc.contributor.authorZeigler, JFen_AU
dc.contributor.authorZaider, Men_AU
dc.contributor.authorRosenfeld, ABen_AU
dc.date.accessioned2016-11-01T00:56:20Zen_AU
dc.date.available2016-11-01T00:56:20Zen_AU
dc.date.issued2014-08-04en_AU
dc.date.statistics2016-11-01en_AU
dc.description.abstractA 4th generation silicon microdosimeter has been designed by the Centre for Medical Radiation Physics (CMRP) at the University of Wollongong using three dimensional (3D) Sensitive Volumes (SVs). This new microdosimeter design has the advantage of well-defined 3D SVs as well as the elimination of lateral charge diffusion by removal of silicon laterally adjacent to the 3D SVs. The gaps between the sensitive volumes are to be backfilled with PolyMethyl MethAcrylate (PMMA) to produce a surrounding tissue equivalent medium. The advantage of this design avoids the generation of secondary particles from inactive silicon lateral to SVs. The response of the microdosimeter to the neutron field from , Pu-Be sources and an avionic radiation environment were simulated using the Geant4 Monte Carlo toolkit for design optimisation. The simulated energy deposition in the SVs from the neutron fields and microdosimetric spectra is presented. The simulation study shows a significant reduction in silicon nuclear recoil contribution to the energy deposition for the novel microdosimeter design. The reduction of silicon recoil events from outside of the SV’s will consequently reduce the uncertainty in the calculateddose equivalent. The simulations have demonstrated that a 3D silicon microdosimeter surrounded by PMMA can produce microdosimetric spectra similar to those of a tissue equivalent microdosimeter. © 2014, IEEE.en_AU
dc.identifier.citationTran, L. T., Guatelli, S., Prokopovich, D. A., Petasecca, M., Lerch, M. L. F., Reinhard, M. I., Zeigler, J. F. Zaider, M. & Rosenfeld, A. B. (2014). A novel silicon microdosimeter using 3D sensitive volumes: modeling the response in neutron fields typical of aviation. IEEE Transactions on Nuclear Science, 61(4), 1552-1557. doi:10.1109/tns.2014.2298461en_AU
dc.identifier.govdoc7555en_AU
dc.identifier.issn0018-9499en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleIEEE Transactions on Nuclear Scienceen_AU
dc.identifier.pagination1552-1557en_AU
dc.identifier.urihttp://dx.doi.org/10.1109/tns.2014.2298461en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7999en_AU
dc.identifier.volume61en_AU
dc.language.isoenen_AU
dc.publisherIEEE Xplore Digital Libraryen_AU
dc.subjectMicrodosimetryen_AU
dc.subjectSiliconen_AU
dc.subjectRadiation effectsen_AU
dc.subjectNeutronsen_AU
dc.subjectEarth coreen_AU
dc.subjectGasesen_AU
dc.titleA novel silicon microdosimeter using 3D sensitive volumes: modeling the response in neutron fields typical of aviationen_AU
dc.typeJournal Articleen_AU
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