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

Emfietzoglou, D; Pathak, A; Papamichael, G; Kostarelos, K; Dhamodaran, S; Sathish, N; Moscovitch, M

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