Fluctuations in collision cascades: Ion beam mixing

Mikko Hautala; Jari Likonen; Ilkka Koponen

doi:10.1016/0168-583X(95)01450-0

Fluctuations in collision cascades: Ion beam mixing

Mikko Hautala^*, Jari Likonen, Ilkka Koponen

^*Corresponding author for this work

University of Helsinki

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

We have studied the consequences of statistical fluctuations in collision cascades on mixing of atoms in dense collision cascades. The distributions of energy densities in spherical and cylindrical spikes are obtained from Monte Carlo simulations of collision cascades where a simple model is used for grouping recoils into separate subcascades. The subcascades are approximated as either spherical or cylindrical. In the latter case we find a decrease by a factor of ten and two in the mixing rate when Au is mixed by 7 MeV Ag and 650 keV Kr ions, respectively, if the mean energy deposition is used instead of distribution. New experimental results from 7 MeV Ag ion bombardment of Au Pt multilayers at 12 and 300 K are reported. The calculated values for mixing rates agree with the measured values.

Original language	English
Pages (from-to)	493-496
Journal	Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume	115
Issue number	1-4
DOIs	https://doi.org/10.1016/0168-583X(95)01450-0
Publication status	Published - 1996
MoE publication type	A1 Journal article-refereed

Access to Document

10.1016/0168-583X(95)01450-0

Cite this

@article{9c0597d0d85545fdaabf4fed6076f55d,

title = "Fluctuations in collision cascades: Ion beam mixing",

abstract = "We have studied the consequences of statistical fluctuations in collision cascades on mixing of atoms in dense collision cascades. The distributions of energy densities in spherical and cylindrical spikes are obtained from Monte Carlo simulations of collision cascades where a simple model is used for grouping recoils into separate subcascades. The subcascades are approximated as either spherical or cylindrical. In the latter case we find a decrease by a factor of ten and two in the mixing rate when Au is mixed by 7 MeV Ag and 650 keV Kr ions, respectively, if the mean energy deposition is used instead of distribution. New experimental results from 7 MeV Ag ion bombardment of Au Pt multilayers at 12 and 300 K are reported. The calculated values for mixing rates agree with the measured values.",

author = "Mikko Hautala and Jari Likonen and Ilkka Koponen",

note = "Project code: KET4134",

year = "1996",

doi = "10.1016/0168-583X(95)01450-0",

language = "English",

volume = "115",

pages = "493--496",

journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Fluctuations in collision cascades

T2 - Ion beam mixing

AU - Hautala, Mikko

AU - Likonen, Jari

AU - Koponen, Ilkka

N1 - Project code: KET4134

PY - 1996

Y1 - 1996

N2 - We have studied the consequences of statistical fluctuations in collision cascades on mixing of atoms in dense collision cascades. The distributions of energy densities in spherical and cylindrical spikes are obtained from Monte Carlo simulations of collision cascades where a simple model is used for grouping recoils into separate subcascades. The subcascades are approximated as either spherical or cylindrical. In the latter case we find a decrease by a factor of ten and two in the mixing rate when Au is mixed by 7 MeV Ag and 650 keV Kr ions, respectively, if the mean energy deposition is used instead of distribution. New experimental results from 7 MeV Ag ion bombardment of Au Pt multilayers at 12 and 300 K are reported. The calculated values for mixing rates agree with the measured values.

AB - We have studied the consequences of statistical fluctuations in collision cascades on mixing of atoms in dense collision cascades. The distributions of energy densities in spherical and cylindrical spikes are obtained from Monte Carlo simulations of collision cascades where a simple model is used for grouping recoils into separate subcascades. The subcascades are approximated as either spherical or cylindrical. In the latter case we find a decrease by a factor of ten and two in the mixing rate when Au is mixed by 7 MeV Ag and 650 keV Kr ions, respectively, if the mean energy deposition is used instead of distribution. New experimental results from 7 MeV Ag ion bombardment of Au Pt multilayers at 12 and 300 K are reported. The calculated values for mixing rates agree with the measured values.

U2 - 10.1016/0168-583X(95)01450-0

DO - 10.1016/0168-583X(95)01450-0

M3 - Article

SN - 0168-583X

VL - 115

SP - 493

EP - 496

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

IS - 1-4

ER -

Fluctuations in collision cascades: Ion beam mixing

Abstract

Access to Document

Fingerprint

Cite this