Energy loss of swift protons in liquid water: role of optical data input and extension algorithms

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Title: Energy loss of swift protons in liquid water: role of optical data input and extension algorithms
Authors: García Molina, Rafael | Abril, Isabel | Kyriakou, Ioanna | Emfietzoglou, Dimitris
Research Group/s: Interacción de Partículas Cargadas con la Materia
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada
Keywords: Energy loss | Swift protons | Liquid water | Stopping power | Optical data
Knowledge Area: Física Aplicada
Issue Date: 2012
Publisher: Springer Science + Business Media
Citation: GARCIA-MOLINA, Rafael, et al. "Energy loss of swift protons in liquid water: role of optical data input and extension algorithms". En: Radiation Damage in Biomolecular Systems / Gustavo García Gómez-Tejedor, Martina Christina Fuss (Eds.). Dordrecht : Springer, 2012. ISBN 978-94-007-2563-8, pp. 239-261
Abstract: A short review of the dielectric approach used to describe the energy deposited in liquid water by swift proton beams is presented. Due to the essential role played by the electronic excitation spectrum of the target, characterized by its energy loss function (ELF), we discuss in detail the procedure to obtain a reliable ELF from experimental optical data, which corresponds to zero momentum transfer. We also analyse the influence of the different methods used to extend this optical ELF to non-zero momentum transfers. From these different methods we calculate the stopping power and energy loss straggling of liquid water for proton beams, comparing them with other data available in the literature. In general, a good agreement is found at high projectile incident energy, but differences appear at energies around and lower than the maximum in the stopping power. Finally, the energy delivered to the target as a function of the depth (i.e., the depth-dose distribution) is obtained by means of a simulation code that takes into account the main interactions of the projectile with the target.
Sponsor: R.G.M. and I.A. acknowledge financial support from the Spanish Ministerio de Ciencia e Innovación (Project FIS2010-17225). Financial support for I.K. and D.E. by the European Union FP7 ANTICARB (HEALTH-F2-2008-201587) is recognized. This work has benefited from the collaboration within COST Action MP 1002, Nanoscale Insights into Ion Beam Cancer Therapy.
ISBN: 978-94-007-2563-8
DOI: 10.1007/978-94-007-2564-5_15
Language: eng
Type: info:eu-repo/semantics/bookPart
Rights: The original publication is available at
Peer Review: si
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Appears in Collections:Research funded by the EU
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