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

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

doi:10.1016/j.nimb.2005.08.001

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

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

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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 Z1-corrections, associated with the Barkas and Bloch effects, contribute minimally (

Original language	English
Pages (from-to)	55-60
Number of pages	5
Journal	Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume	242
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nimb.2005.08.001
Publication status	Published - Jan 2006

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title = "A study on the electronic stopping of protons in soft biological matter",

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 Z1-corrections, associated with the Barkas and Bloch effects, contribute minimally (",

author = "D. Emfietzoglou and A. Pathak and G. Papamichael and K. Kostarelos and S. Dhamodaran and N. Sathish and M. Moscovitch",

note = "Times Cited: 15 14th International Conference on Ion Beam Modification of Materials (IBMM 2004) SEP 05-10, 2004 Pacific Grove, CA Amer Vacuum Soc, NE Calif Chapter Natarajan, Sathish/C-1187-2012; Emfietzoglou, Dimitris/G-7168-2012 Natarajan, Sathish/0000-0001-7274-4576; 0 15",

year = "2006",

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doi = "10.1016/j.nimb.2005.08.001",

language = "English",

volume = "242",

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AU - Emfietzoglou, D.

AU - Pathak, A.

AU - Papamichael, G.

AU - Kostarelos, K.

AU - Dhamodaran, S.

AU - Sathish, N.

AU - Moscovitch, M.

N1 - Times Cited: 15 14th International Conference on Ion Beam Modification of Materials (IBMM 2004) SEP 05-10, 2004 Pacific Grove, CA Amer Vacuum Soc, NE Calif Chapter Natarajan, Sathish/C-1187-2012; Emfietzoglou, Dimitris/G-7168-2012 Natarajan, Sathish/0000-0001-7274-4576; 0 15

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N2 - 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 Z1-corrections, associated with the Barkas and Bloch effects, contribute minimally (

AB - 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 Z1-corrections, associated with the Barkas and Bloch effects, contribute minimally (

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DO - 10.1016/j.nimb.2005.08.001

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VL - 242

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JO - Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

IS - 1-2

ER -

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

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