Nuclear stopping in transmission experiments

Glazov, Lev G.; Sigmund, Peter

doi:10.1016/s0168-583x(03)00461-0

Cited by 21 publications

(13 citation statements)

References 31 publications

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“…Clearly, at energies below 0.01 MeV, the magnitude of extracted stopping cross sections depends increasingly sensitively on details of the adopted model for single and multiple scattering. Here we note that results of the Bohr-Williams-Fastrup model have been confirmed by comparison with exact calculations based on the Bothe-Landau model [20]. We have also checked that results of computations with a straight Thomas-Fermi interaction potential differ by less than 1% from what is found for Molière interaction.…”

Section: Cautional Remarkssupporting

confidence: 71%

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Reciprocity analysis of electronic stopping of slow ions

Sigmund

Kuzmin

Schinner

2019

Nuclear Instruments and Methods in Physics Research Section B:

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Reciprocity denotes the (approximate) equality of the electronic stopping cross section of element A in element B with the one of element B in element A. Reciprocity is expected in the energy range below ∼ 0.1 MeV/u. For ions heavier than protons, most measurements are performed by the transmission technique. In order to minimize nuclear energy loss, only a narrow beam of penetrating ions is allowed to enter the detector. This implies that also the electronic energy loss is underestimated. We have estimated the magnitude of the necessary correction on the basis of the PASS code and its influence on the expected reciprocity and find that reciprocity is not necessarily violated, even if the reported cross sections differ significantly. However, we also find differences between reported stopping cross sections and computed reduced stopping cross sections that we cannot reconcile on the basis of the PASS code. These differences are found to reflect the well-known Z 1 structure, which is not inherent in the present version of PASS.

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Section: Cautional Remarkssupporting

confidence: 71%

“…In the conventional picture [6,16,18,13,20,21], electronic stopping is treated as a friction force and its dependence on scattering angle or impact parameter is neglected.…”

Section: Discussionmentioning

confidence: 99%

Reciprocity analysis of electronic stopping of slow ions

Sigmund

Kuzmin

Schinner

2019

Nuclear Instruments and Methods in Physics Research Section B:

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“…In the literature we have identified papers that do not mention nuclear stopping at all [60]. More often, the description of the applied correction for nuclear stopping is incomplete [70], and cases have been identified, where the full nuclear stopping has been subtracted from the measured energy loss, neglecting the fact that when energy loss is measured in transmission, ions that experience large nuclear energy losses are deflected by large angles and do not enter the detector [54,59]. In ref.…”

Section: Nuclear Stopping Impact-parameter-dependent Energy Lossmentioning

confidence: 99%

Expanded PASS stopping code

Schinner

Sigmund

2019

Nuclear Instruments and Methods in Physics Research Section B:

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“…Consequently, in TR the effective nuclear stopping will contribute less than in BS, S * n,TR < S * n,BS . Different models have been presented to determine the effective contribution of nuclear losses in different geometries [23].…”

Section: Transmission Versus Backscatteringmentioning

confidence: 99%

Energy loss of low-energy ions in transmission and backscattering experiments

et al. 2013

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The determination of the electronic stopping power for low-energy ions is an experimentally demanding task. In this paper we elaborate on the different effects of nuclear stopping and multiple scattering on the energy spectra for different experimental geometries, i.e., transmission through thin foils and backscattering from thin films. By calculating distributions of path lengths and scattering angles we demonstrate how electronic stopping, nuclear stopping, and multiple scattering add up to the total energy loss. We show that at low energies it is important to properly disentangle these effects to extract electronic stopping from the measured energy loss spectra.

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Nuclear stopping in transmission experiments

Cited by 21 publications

References 31 publications

Reciprocity analysis of electronic stopping of slow ions

Reciprocity analysis of electronic stopping of slow ions

Expanded PASS stopping code

Energy loss of low-energy ions in transmission and backscattering experiments

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