Mixing of nuclear and electronic stopping powers in the formation of surface tracks on mica by fullerene impact

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Abstract

The experimental results on ion-induced hillocks on mica were analyzed in the range of 0.025 <E <35 MeV/nucleon. The thermal spike was characterized quantitatively by the parameters derived in our previous track studies. The hillock height h varies linearly with the spike energy ε = gSe + βSn with a threshold εth = 3.8 keV/nm, where Se and Sn are the electronic and nuclear stopping powers and g is the efficiency. A calculation by the SRIM code provides β = 0.9 and 0.33 for Cn and Cun, Gen ions, respectively. From the slope of the h-ε line we obtained v/D = 0.36 nm-1, where v is the velocity of emergence of the hillocks and D is the thermal diffusivity. Our estimate is D <0.057 cm2/s in the spike, which is much lower than the value, obtained by the free electron approximation. The results confirm on an absolute scale that only about 17/40% of Se is transferred into thermal energy at high/low E values and the equilibrium melting point is a good parameter in the conditions of a spike.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume191
Issue number1-4
DOIs
Publication statusPublished - May 2002

Fingerprint

Fullerenes
Mica
stopping power
Power electronics
mica
spikes
fullerenes
Ions
Thermal diffusivity
Thermal energy
electronics
Nuclear energy
Melting point
Electrons
thermal diffusivity
thermal energy
free electrons
melting points
ions
slopes

Keywords

  • AFM
  • Ion irradiation
  • Thermal spike

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

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title = "Mixing of nuclear and electronic stopping powers in the formation of surface tracks on mica by fullerene impact",
abstract = "The experimental results on ion-induced hillocks on mica were analyzed in the range of 0.025 <E <35 MeV/nucleon. The thermal spike was characterized quantitatively by the parameters derived in our previous track studies. The hillock height h varies linearly with the spike energy ε = gSe + βSn with a threshold εth = 3.8 keV/nm, where Se and Sn are the electronic and nuclear stopping powers and g is the efficiency. A calculation by the SRIM code provides β = 0.9 and 0.33 for Cn and Cun, Gen ions, respectively. From the slope of the h-ε line we obtained v/D = 0.36 nm-1, where v is the velocity of emergence of the hillocks and D is the thermal diffusivity. Our estimate is D <0.057 cm2/s in the spike, which is much lower than the value, obtained by the free electron approximation. The results confirm on an absolute scale that only about 17/40{\%} of Se is transferred into thermal energy at high/low E values and the equilibrium melting point is a good parameter in the conditions of a spike.",
keywords = "AFM, Ion irradiation, Thermal spike",
author = "G. Szenes",
year = "2002",
month = "5",
doi = "10.1016/S0168-583X(02)00508-6",
language = "English",
volume = "191",
pages = "27--31",
journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",
issn = "0168-583X",
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number = "1-4",

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TY - JOUR

T1 - Mixing of nuclear and electronic stopping powers in the formation of surface tracks on mica by fullerene impact

AU - Szenes, G.

PY - 2002/5

Y1 - 2002/5

N2 - The experimental results on ion-induced hillocks on mica were analyzed in the range of 0.025 <E <35 MeV/nucleon. The thermal spike was characterized quantitatively by the parameters derived in our previous track studies. The hillock height h varies linearly with the spike energy ε = gSe + βSn with a threshold εth = 3.8 keV/nm, where Se and Sn are the electronic and nuclear stopping powers and g is the efficiency. A calculation by the SRIM code provides β = 0.9 and 0.33 for Cn and Cun, Gen ions, respectively. From the slope of the h-ε line we obtained v/D = 0.36 nm-1, where v is the velocity of emergence of the hillocks and D is the thermal diffusivity. Our estimate is D <0.057 cm2/s in the spike, which is much lower than the value, obtained by the free electron approximation. The results confirm on an absolute scale that only about 17/40% of Se is transferred into thermal energy at high/low E values and the equilibrium melting point is a good parameter in the conditions of a spike.

AB - The experimental results on ion-induced hillocks on mica were analyzed in the range of 0.025 <E <35 MeV/nucleon. The thermal spike was characterized quantitatively by the parameters derived in our previous track studies. The hillock height h varies linearly with the spike energy ε = gSe + βSn with a threshold εth = 3.8 keV/nm, where Se and Sn are the electronic and nuclear stopping powers and g is the efficiency. A calculation by the SRIM code provides β = 0.9 and 0.33 for Cn and Cun, Gen ions, respectively. From the slope of the h-ε line we obtained v/D = 0.36 nm-1, where v is the velocity of emergence of the hillocks and D is the thermal diffusivity. Our estimate is D <0.057 cm2/s in the spike, which is much lower than the value, obtained by the free electron approximation. The results confirm on an absolute scale that only about 17/40% of Se is transferred into thermal energy at high/low E values and the equilibrium melting point is a good parameter in the conditions of a spike.

KW - AFM

KW - Ion irradiation

KW - Thermal spike

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U2 - 10.1016/S0168-583X(02)00508-6

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VL - 191

SP - 27

EP - 31

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

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