A study of the dechanneling of protons in SiC polytype crystals in the energy range Ep=400-650 keV

M. Kokkoris; G. Perdikakis; S. Kossionides; S. Petrović; R. Vlastou; R. Grötzschel

doi:10.1016/j.nimb.2004.01.058

A study of the dechanneling of protons in SiC polytype crystals in the energy range E_p=400-650 keV

M. Kokkoris, G. Perdikakis, S. Kossionides, S. Petrović, R. Vlastou, R. Grötzschel

Physics

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

In the present work, the energy spectra of protons channeled along the (0001) axis of SiC polytype crystals (namely 4H and 6H) in the energy range E_p=400-650 keV, in the backscattering geometry, were taken and analyzed. Computer simulations are in very good agreement with the measured spectra. The accurate reproduction of the experimental channeling spectra in the backscattering geometry is strongly based on the investigation of the correct dechanneling function and α, the ratio of the stopping powers in the aligned and random mode. In the present work, the applicability of a Gompertz type sigmoidal dechanneling function, with two parameters, k and x_c, which represent characteristic dechanneling rate and range, respectively, is examined, and the results are compared to the ones obtained in the past, concerning the same polytype structures, based on the assumption that the dechanneling of protons follows an exponential law, for the energy range E _p=1.7-2.4 MeV.

Original language	English
Pages (from-to)	226-231
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	219-220
Issue number	1-4
DOIs	https://doi.org/10.1016/j.nimb.2004.01.058
State	Published - Jun 2004
Event	Proceedings of the Sixteenth International Conference on Ion - Albuquerque, NM., United States Duration: Jun 29 2003 → Jul 4 2003

Keywords

Backscattering
Channeling
Nuclear resonance
RBS
Stopping power ratio

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10.1016/j.nimb.2004.01.058

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Kokkoris, M., Perdikakis, G., Kossionides, S., Petrović, S., Vlastou, R., & Grötzschel, R. (2004). A study of the dechanneling of protons in SiC polytype crystals in the energy range E_p=400-650 keV. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 219-220(1-4), 226-231. https://doi.org/10.1016/j.nimb.2004.01.058

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title = "A study of the dechanneling of protons in SiC polytype crystals in the energy range Ep=400-650 keV",

abstract = "In the present work, the energy spectra of protons channeled along the (0001) axis of SiC polytype crystals (namely 4H and 6H) in the energy range Ep=400-650 keV, in the backscattering geometry, were taken and analyzed. Computer simulations are in very good agreement with the measured spectra. The accurate reproduction of the experimental channeling spectra in the backscattering geometry is strongly based on the investigation of the correct dechanneling function and α, the ratio of the stopping powers in the aligned and random mode. In the present work, the applicability of a Gompertz type sigmoidal dechanneling function, with two parameters, k and xc, which represent characteristic dechanneling rate and range, respectively, is examined, and the results are compared to the ones obtained in the past, concerning the same polytype structures, based on the assumption that the dechanneling of protons follows an exponential law, for the energy range E p=1.7-2.4 MeV.",

keywords = "Backscattering, Channeling, Nuclear resonance, RBS, Stopping power ratio",

author = "M. Kokkoris and G. Perdikakis and S. Kossionides and S. Petrovi{\'c} and R. Vlastou and R. Gr{\"o}tzschel",

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month = jun,

doi = "10.1016/j.nimb.2004.01.058",

language = "English",

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Kokkoris, M, Perdikakis, G, Kossionides, S, Petrović, S, Vlastou, R & Grötzschel, R 2004, 'A study of the dechanneling of protons in SiC polytype crystals in the energy range E_p=400-650 keV', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 219-220, no. 1-4, pp. 226-231. https://doi.org/10.1016/j.nimb.2004.01.058

A study of the dechanneling of protons in SiC polytype crystals in the energy range E_p=400-650 keV. / Kokkoris, M.; Perdikakis, G.; Kossionides, S.; Petrović, S.; Vlastou, R.; Grötzschel, R.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 219-220, No. 1-4, 06.2004, p. 226-231.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - A study of the dechanneling of protons in SiC polytype crystals in the energy range Ep=400-650 keV

AU - Kokkoris, M.

AU - Perdikakis, G.

AU - Kossionides, S.

AU - Petrović, S.

AU - Vlastou, R.

AU - Grötzschel, R.

PY - 2004/6

Y1 - 2004/6

N2 - In the present work, the energy spectra of protons channeled along the (0001) axis of SiC polytype crystals (namely 4H and 6H) in the energy range Ep=400-650 keV, in the backscattering geometry, were taken and analyzed. Computer simulations are in very good agreement with the measured spectra. The accurate reproduction of the experimental channeling spectra in the backscattering geometry is strongly based on the investigation of the correct dechanneling function and α, the ratio of the stopping powers in the aligned and random mode. In the present work, the applicability of a Gompertz type sigmoidal dechanneling function, with two parameters, k and xc, which represent characteristic dechanneling rate and range, respectively, is examined, and the results are compared to the ones obtained in the past, concerning the same polytype structures, based on the assumption that the dechanneling of protons follows an exponential law, for the energy range E p=1.7-2.4 MeV.

AB - In the present work, the energy spectra of protons channeled along the (0001) axis of SiC polytype crystals (namely 4H and 6H) in the energy range Ep=400-650 keV, in the backscattering geometry, were taken and analyzed. Computer simulations are in very good agreement with the measured spectra. The accurate reproduction of the experimental channeling spectra in the backscattering geometry is strongly based on the investigation of the correct dechanneling function and α, the ratio of the stopping powers in the aligned and random mode. In the present work, the applicability of a Gompertz type sigmoidal dechanneling function, with two parameters, k and xc, which represent characteristic dechanneling rate and range, respectively, is examined, and the results are compared to the ones obtained in the past, concerning the same polytype structures, based on the assumption that the dechanneling of protons follows an exponential law, for the energy range E p=1.7-2.4 MeV.

KW - Backscattering

KW - Channeling

KW - Nuclear resonance

KW - RBS

KW - Stopping power ratio

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U2 - 10.1016/j.nimb.2004.01.058

DO - 10.1016/j.nimb.2004.01.058

M3 - Conference article

AN - SCOPUS:18144437954

VL - 219-220

SP - 226

EP - 231

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

SN - 0168-583X

IS - 1-4

Y2 - 29 June 2003 through 4 July 2003

ER -

A study of the dechanneling of protons in SiC polytype crystals in the energy range E_p=400-650 keV

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Keywords

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