A critical overview of recent stopping power programs for positive ions in solid elements

Paul, H.; Sánchez-Parcerisa, Daniel

doi:10.1016/j.nimb.2013.07.012

Cited by 36 publications

(21 citation statements)

References 35 publications

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“…8(c), where the Bragg peak is just exiting the active area, the saturation effects are less evident due to the sharp decrease of the deposited dose. Other causes of uncertainties in the quantification of the quenching effect can be attributed to the stopping power libraries used by SRIM which show uncertainties of the order of 10% at energies in the proximity of the Bragg peak [16][17][18]. This source of uncertainty is also well known in other general purpose Monte Carlo codes such as PENH [19] and GEANT4 [20].…”

Section: Resultsmentioning

confidence: 99%

Dosimetric response of radiochromic films to protons of low energies in the Bragg peak region

Battaglia

Schardt

Espino

et al. 2016

Phys. Rev. Accel. Beams

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One of the major advantages of proton or ion beams, applied in cancer treatment, is their excellent depth-dose profile exhibiting a low dose in the entrance channel and a distinct dose maximum (Bragg peak) near the end of range in tissue. In the region of the Bragg peak, where the protons or ions are almost stopped, experimental studies with low-energy particle beams and thin biological samples may contribute valuable information on the biological effectiveness in the stopping region. Such experiments, however, require beam optimization and special dosimetry techniques for determining the absolute dose and dose homogeneity for very thin biological samples. At the National Centre of Accelerators in Seville, one of the beam lines at the 3 MV Tandem Accelerator was equipped with a scattering device, a special parallel-plate ionization chamber with very thin electrode foils and target holders for cell cultures. In this work, we present the calibration in absolute dose of EBT3 films [Gafchromic radiotherapy films, http://www.ashland.com/products/gafchromic-radiotherapy-films] for proton energies in the region of the Bragg peak, where the linear energy transfer increases and becomes more significant for radiobiology studies, as well as the response of the EBT3 films for different proton energy values. To irradiate the films in the Bragg peak region, the energy of the beam was degraded passively, by interposing Mylar foils of variable thickness to place the Bragg peak inside the active layer of the film. The results obtained for the beam degraded in Mylar foils are compared with the dose calculated by means of the measurement of the beam fluence with an ionization chamber and the energy loss predicted by srim2008 code.EU Initial Training Marie Curie Network FP7-PEOPLE-2011-ITN-289485Spanish Research Projects No. FPA2014-53290-C2-2-PSpanish Research Projects No. FPA2013-47327-C2-1-RAndalusian Research Project No. P12-FQM-160

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Section: Resultsmentioning

confidence: 99%

Dosimetric response of radiochromic films to protons of low energies in the Bragg peak region

Battaglia

Schardt

Espino

et al. 2016

Phys. Rev. Accel. Beams

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“…For RBS and EBS analysis, the major systematic uncertainties are related to the (particle*∆Ω) product [39] as obtained by fitting the signal of the substrate, due to two different causes: possible inaccuracies in the stopping power and residual channeling effects. Recent energy loss studies have demonstrated that either fully theoretical or semi-empirical stopping power models are expected to agree to experimental data within ≈ 1 % for H + and He + projectiles at energies ≥ 1.0 MeV [40,41]. Nevertheless, in some particular cases, even the most recent tabulated stopping power values for light projectiles, as well as SRIM predictions, are found to be problematic, especially for reactive transition metals (such as vanadium) [42].…”

Section: Budget Of Uncertaintiesmentioning

confidence: 99%

Accurate high-resolution depth profiling of magnetron sputtered transition metal alloy films containing light species: A multi-method approach

et al. 2019

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We present an assessment of a multi-method approach based on ion beam analysis to obtain highresolution depth profiles of the total chemical composition of complex alloy systems. As a model system we employ an alloy based on several transition metals and containing light species. Samples have been investigated by a number of different ion-beam based techniques, i.e., Rutherford Backscattering Spectrometry, Particle-Induced X-ray Emission, Elastic Backscattering Spectrometry and Time-of-Flight/Energy Elastic Recoil Detection Analysis. Sets of spectra obtained from these different techniques were analyzed both independently and following an iterative and self-consistent approach yielding a more accurate depth profile of the sample, including both metallic heavy constituents (Cr, Fe and Ni) as well as the rather reactive light species (C, O) in the alloy. A quantitative comparison in terms of achievable precision and accuracy is made and the limitations of the single method approach are discussed for the different techniques. The multi-method approach is shown to yield significantly improved and accurate information on stoichiometry, depth distribution, and thickness of the alloy with the improvements being decisive for a detailed correlation of composition to the material properties such as corrosion strength. The study also shows the increased relative importance of experimental statistics for the achievable accuracy in the multi-method approach.

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“…This energy transfer causes a drop in kT (t) as the plasma expands in time, which can be estimated by calculating the stopping powers with a Monte Carlo simulation code, SRIM [32,33]. In laser-clusterfusion experiments where the overall density is that of a gas (average atomic number density of 10 18 −10 19 cm −3 ), these energy losses are usually small (∼5% in Ref.…”

Section: Disassembly Time Of the Plasmamentioning

confidence: 99%

Disassembly time of deuterium-cluster-fusion plasma irradiated by an intense laser pulse

Bang

2015

Phys. Rev. E

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Energetic deuterium ions from large deuterium clusters (>10nm diameter) irradiated by an intense laser pulse (>10(16)W/cm(2)) produce DD fusion neutrons for a time interval determined by the geometry of the resulting fusion plasma. We present an analytical solution of this time interval, the plasma disassembly time, for deuterium plasmas that are cylindrical in shape. Assuming a symmetrically expanding deuterium plasma, we calculate the expected fusion neutron yield and compare with an independent calculation of the yield using the concept of a finite confinement time at a fixed plasma density. The calculated neutron yields agree quantitatively with the available experimental data. Our one-dimensional simulations indicate that one could expect a tenfold increase in total neutron yield by magnetically confining a 10-keV deuterium fusion plasma for 10ns.

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A critical overview of recent stopping power programs for positive ions in solid elements

Cited by 36 publications

References 35 publications

Dosimetric response of radiochromic films to protons of low energies in the Bragg peak region

Dosimetric response of radiochromic films to protons of low energies in the Bragg peak region

Accurate high-resolution depth profiling of magnetron sputtered transition metal alloy films containing light species: A multi-method approach

Disassembly time of deuterium-cluster-fusion plasma irradiated by an intense laser pulse

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