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 |