Proton energy loss in solids

Sirotinin, E.I.; Tulinov, A.F.; Khodyrev, V.A.; Mizgulin, V. N.

doi:10.1016/0168-583x(84)90577-9

Cited by 41 publications

(14 citation statements)

References 24 publications

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“…For Gd, the maximum SCS is found to be very high (Gd ~ 48  10 -15 eV cm 2 /atom), while the position of the stopping maximum is rather low (Emax ~ 80 keV). At higher energies, the RBS data coincide with data from literature [33,34,35,36]. The bold solid line is a fit using the semiempirical model described in [27].…”

supporting

confidence: 75%

Electronic Stopping of Slow Protons in Transition and Rare Earth Metals: Breakdown of the Free Electron Gas Concept

et al. 2017

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The electronic stopping cross sections (SCS) of Ta and Gd for slow protons have been investigated experimentally. The data are compared to the results for Pt and Au, to learn how electronic stopping in transition and rare earth metals correlates with features of the electronic band structures. The extraordinarily high SCS observed for protons in Ta and Gd cannot be understood in terms of a free electron gas model, but are related to the high densities of both occupied and unoccupied electronic states in these metals.

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supporting

confidence: 75%

Electronic Stopping of Slow Protons in Transition and Rare Earth Metals: Breakdown of the Free Electron Gas Concept

et al. 2017

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“…It looks surprising at a first glance that, in contrast with the predicted increase of the yield compared to the singlescattering spectrum [27,28], this partial spectrum shows the inverse ordering due to multiple scattering. This is, however, natural because in this partial spectrum we do not consider the compensation of the transport out of the internal cone by the counter-transport from the external region.…”

Section: Program Tests and Applicationsmentioning

confidence: 82%

Shower approach in the simulation of ion scattering from solids

et al. 2011

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An efficient approach for the simulation of ion scattering from solids is proposed. For every encountered atom, we take multiple samples of its thermal displacements among those which result in scattering with high probability to finally reach the detector. As a result, the detector is illuminated by intensive "showers," where each event of detection must be weighted according to the actual probability of the atom displacement. The computational cost of such simulation is orders of magnitude lower than in the direct approach, and a comprehensive analysis of multiple and plural scattering effects becomes possible. We use this method for two purposes. First, the accuracy of the approximate approaches, developed mainly for ion-beam structural analysis, is verified. Second, the possibility to reproduce a wide class of experimental conditions is used to analyze some basic features of ion-solid collisions: the role of double violent collisions in low-energy ion scattering; the origin of the "surface peak" in scattering from amorphous samples; the low-energy tail in the energy spectra of scattered medium-energy ions due to plural scattering; and the degradation of blocking patterns in two-dimensional angular distributions with increasing depth of scattering. As an example of simulation for ions of MeV energies, we verify the time reversibility for channeling and blocking of 1-MeV protons in a W crystal. The possibilities of analysis that our approach offers may be very useful for various applications, in particular, for structural analysis with atomic resolution.

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“…In this figure, it is still possible to observe that this procedure was able to obtain stopping power values around the maximum stopping, and it is found to be very high (SCS max,Gd ∼ 48 × 10 −15 eV cm 2 /atoms), with a position of the maximum at E max ∼ 80 keV. At higher energies the RBS data coincide with data from literature [163,154,164,165]. The thick solid line is a fit using the model described in Sec.…”

Section: Resultssupporting

confidence: 83%

“…Besides, at low energies, the screening potential must be considered. However, Sirotonin et al through a series of publications between 1970 and 1980 [151,152,153,154], measured the energy losses of protons and alpha particles in several elemental materials adopting directly Eq. 4.1, and making only few adjusts and normalizations to rule out some sources of uncertainties, they found final results with a relatively good uncertainty averaged on ∼ 10 % 3 .…”

Section: Energy Loss Measurementsmentioning

confidence: 99%

Energy loss of light ions (H+ and He+) in matter: high accuracy measurements and comparison with the FEG model

Moro¹

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The phenomenon of energy loss that occurs when an ion interacts with matter, also called stopping power, has been investigated for more than a century, and has provided findings of interest. However, reliable procedures for obtaining accurate experimental measurements and a fully theoretical comprehension of the process are tasks still in high demand by the scientific community. Moreover, stopping power data are prerequisites in several applications in modern science, such as engineering, ion implantation and modification of materials, damage to electronics devices (e.g. space radiation), medical physics (e.g. proton therapy), among others. In this thesis we i) develop a rigorous experimental protocol to measure stopping power with high precision, and ii) investigate 1 the collapse of the free electron gas (FEG) model in energy loss of light ions (protons) at a low energy range in transition and rare-earth metals. In the first part, we present an approach to obtain, with high accuracy, the stopping cross sections in the pure materials Al and Mo for protons in the energy range of [0.9 − 3.6] MeV by means of the transmission method. The traceability of the sources of uncertainties are fully evaluated and the final accuracy of the results is 0.63 % (0.32 % rand. and 0.54 % syst.) for Al, and 1.5 % (0.44 % rand. and 1.4 % syst.) for Mo, with both results primarily limited by the quality and homogeneity of the stopping foils. For Al, this high accuracy represents an improvement com-Foremost I want to express my gratitude to my advisor, co-author and friend Prof. Dr. Manfredo H. Tabacniks. His guidance, encouragement over the years, vast scientific knowledge and notable vision in many other areas (e.g. ethics and interaction with participants) have always inspired me to reach interesting findings in physics and in life, always expanding my mind. Without his support, the accomplishments here presented would never have been possible. Thank you so much.

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Proton energy loss in solids

Cited by 41 publications

References 24 publications

Electronic Stopping of Slow Protons in Transition and Rare Earth Metals: Breakdown of the Free Electron Gas Concept

Electronic Stopping of Slow Protons in Transition and Rare Earth Metals: Breakdown of the Free Electron Gas Concept

Shower approach in the simulation of ion scattering from solids

Energy loss of light ions (H+ and He+) in matter: high accuracy measurements and comparison with the FEG model

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