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A study on the electronic stopping of protons in soft biological matter

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dc.contributor.author Emfietzoglou, D en
dc.contributor.author Pathak, A en
dc.contributor.author Papamichael, G en
dc.contributor.author Kostarelos, K en
dc.contributor.author Dhamodaran, S en
dc.contributor.author Sathish, N en
dc.contributor.author Moscovitch, M en
dc.date.accessioned 2014-03-01T02:43:52Z
dc.date.available 2014-03-01T02:43:52Z
dc.date.issued 2006 en
dc.identifier.issn 0168-583X en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/31534
dc.subject Dielectric Function en
dc.subject Loss Function en
dc.subject Radiation Damage en
dc.subject Radiation Dosimetry en
dc.subject Stopping Power en
dc.subject Higher Order en
dc.subject.classification Instruments & Instrumentation en
dc.subject.classification Nuclear Science & Technology en
dc.subject.classification Physics, Atomic, Molecular & Chemical en
dc.subject.classification Physics, Nuclear en
dc.subject.other Dielectric properties of liquids en
dc.subject.other Dosimetry en
dc.subject.other Mathematical models en
dc.subject.other Parameter estimation en
dc.subject.other Protons en
dc.subject.other Radiation damage en
dc.subject.other Analytic parameterizations en
dc.subject.other Electronic stopping en
dc.subject.other Liquid water en
dc.subject.other Biomaterials en
dc.title A study on the electronic stopping of protons in soft biological matter en
heal.type conferenceItem en
heal.identifier.primary 10.1016/j.nimb.2005.08.001 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.nimb.2005.08.001 en
heal.language English en
heal.publicationDate 2006 en
heal.abstract The electronic stopping of protons in liquid water has been investigated by means of the dielectric function properties. Based on a modified Drude dielectric model, an accurate analytic parametrization of the two sets of available optical data for liquid water has been accomplished. The resultant optical loss functions predict an I-value of 80-85 eV. Extension to finite momentum is included by means of simple dispersion algorithms. The influence of different dielectric function approximations and of the higher-order Z(1)-corrections to the stopping power (SP) of liquid water for protons in the 50-1000 keV range is explored. This includes the Bragg peak which, among other things, is of great interest in radiation dosimetry and in predicting radiation damage. The model calculations are within 10-12% of ICRU values with the larger deviations being observed below the SP maximum. The higher-order Z(1)-corrections, associated with the Barkas and Bloch effects, contribute minimally (< 2%) down to the Bragg peak region (similar to 100 keV). At the low end examined (50-100 keV) the Z(1)(4)-term increases more rapidly than the Z(1)(3)-term and their net contribution increases. (c) 2005 Elsevier B.V. All rights reserved. en
heal.publisher ELSEVIER SCIENCE BV en
heal.journalName Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms en
dc.identifier.doi 10.1016/j.nimb.2005.08.001 en
dc.identifier.isi ISI:000236225200016 en
dc.identifier.volume 242 en
dc.identifier.issue 1-2 en
dc.identifier.spage 55 en
dc.identifier.epage 60 en


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