Velocity dependence of heavy-ion stopping below the maximum

In the slowing-down of heavy ions in materials, the standard description by Lindhard and Scharff assumes the electronic stopping cross section to be proportional to the projectile speed v up to close to a stopping maximum, which is related to the Thomas–Fermi speed vTF. It is well known that strict...

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Published inNuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 342; pp. 292 - 299
Main Authors Sigmund, P., Schinner, A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2015
Subjects
Charge
Cross sections
Cross sections (physics)
Deviation
Electronics
Ion charge
Low-velocity stopping
Mathematical analysis
Screening
Shells
Stopping force
Stopping power
Swift heavy ions
Stopping force
Swift heavy ions
Ion charge
Stopping power
Low-velocity stopping
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Summary:In the slowing-down of heavy ions in materials, the standard description by Lindhard and Scharff assumes the electronic stopping cross section to be proportional to the projectile speed v up to close to a stopping maximum, which is related to the Thomas–Fermi speed vTF. It is well known that strict proportionality with v is rarely observed, but little is known about the systematics of observed deviations. In this study we try to identify factors that determine positive or negative curvature of stopping cross sections on the basis of experimental data and of binary stopping theory. We estimate the influence of shell structure of the target and of the equilibrium charge of the ion and comment the role of dynamic screening.
Bibliography:ObjectType-Article-1
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ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2014.10.020