Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift 132Xe ions

G. Baubekova; A. Akilbekov; E. Feldbach; Rolands Grants; Ilze Manika; Anatolijs Popovs; K. Schwartz; E. Vasil'chenko; M. Zdorovets; A. Lushchik

doi:10.1016/j.nimb.2019.11.021

Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift ¹³²Xe ions

G. Baubekova
, A. Akilbekov
, E. Feldbach
, Rolands Grants
, Ilze Manika
, Anatolijs Popovs
, K. Schwartz
, E. Vasil'chenko
, M. Zdorovets
, A. Lushchik^*

^*Corresponding author for this work

L.N. Gumilyov Eurasian National University
University of Tartu
GSI Helmholtz Centre for Heavy Ion Research
University of Latvia

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

27 Citations (Scopus)

Abstract

Accumulation of F-type defects under irradiation of MgO crystals by 0.23-GeV ¹³²Xe ions with fluence varying by three orders of magnitude has been investigated via the spectra of optical absorption and low-temperature cathodoluminescence. The number of single centers continuously increases with fluence without any marks of saturation. At the highest fluence, a mean volume concentration of 3.1 × 10¹⁹ and 3.35 × 10¹⁹ cm⁻³ is reached for F and F⁺ centers, respectively. The F⁺ emission strongly dominates in the cathodoluminescence of irradiated MgO and its enhancement with fluence is detected. However, the creation efficiency of the F₂ aggregate centers is very low and fluence dependence has a complicated shape. Radiation-induced changes of micro-mechanical properties of the same samples have been analysed; the depth profiles of hardening correlate with the ion energy loss. A joint contribution of ionization and impact mechanisms in the formation of structural defects under MgO irradiation with Xe ions is considered.

Original language	English
Pages (from-to)	50-54
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	463
DOIs	https://doi.org/10.1016/j.nimb.2019.11.021
Publication status	Published - 15 Jan 2020

Keywords

Depth profile of hardening
Fluence dependence
Magnesium oxide
Optical absorption
Radiation defects
Swift heavy ions

OECD Field of Science

1.3 Physical Sciences

Access to Document

10.1016/j.nimb.2019.11.021

Cite this

Baubekova, G., Akilbekov, A., Feldbach, E., Grants, R., Manika, I., Popovs, A., Schwartz, K., Vasil'chenko, E., Zdorovets, M., & Lushchik, A. (2020). Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift ¹³²Xe ions. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 463, 50-54. https://doi.org/10.1016/j.nimb.2019.11.021

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title = "Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift 132Xe ions",

abstract = "Accumulation of F-type defects under irradiation of MgO crystals by 0.23-GeV 132Xe ions with fluence varying by three orders of magnitude has been investigated via the spectra of optical absorption and low-temperature cathodoluminescence. The number of single centers continuously increases with fluence without any marks of saturation. At the highest fluence, a mean volume concentration of 3.1 × 1019 and 3.35 × 1019 cm−3 is reached for F and F+ centers, respectively. The F+ emission strongly dominates in the cathodoluminescence of irradiated MgO and its enhancement with fluence is detected. However, the creation efficiency of the F2 aggregate centers is very low and fluence dependence has a complicated shape. Radiation-induced changes of micro-mechanical properties of the same samples have been analysed; the depth profiles of hardening correlate with the ion energy loss. A joint contribution of ionization and impact mechanisms in the formation of structural defects under MgO irradiation with Xe ions is considered.",

keywords = "Depth profile of hardening, Fluence dependence, Magnesium oxide, Optical absorption, Radiation defects, Swift heavy ions",

author = "G. Baubekova and A. Akilbekov and E. Feldbach and Rolands Grants and Ilze Manika and Anatolijs Popovs and K. Schwartz and E. Vasil'chenko and M. Zdorovets and A. Lushchik",

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doi = "10.1016/j.nimb.2019.11.021",

language = "English",

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Baubekova, G, Akilbekov, A, Feldbach, E, Grants, R, Manika, I, Popovs, A, Schwartz, K, Vasil'chenko, E, Zdorovets, M & Lushchik, A 2020, 'Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift ¹³²Xe ions', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 463, pp. 50-54. https://doi.org/10.1016/j.nimb.2019.11.021

Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift ¹³²Xe ions. / Baubekova, G.; Akilbekov, A.; Feldbach, E. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 463, 15.01.2020, p. 50-54.

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

TY - JOUR

T1 - Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift 132Xe ions

AU - Baubekova, G.

AU - Akilbekov, A.

AU - Feldbach, E.

AU - Grants, Rolands

AU - Manika, Ilze

AU - Popovs, Anatolijs

AU - Schwartz, K.

AU - Vasil'chenko, E.

AU - Zdorovets, M.

AU - Lushchik, A.

PY - 2020/1/15

Y1 - 2020/1/15

N2 - Accumulation of F-type defects under irradiation of MgO crystals by 0.23-GeV 132Xe ions with fluence varying by three orders of magnitude has been investigated via the spectra of optical absorption and low-temperature cathodoluminescence. The number of single centers continuously increases with fluence without any marks of saturation. At the highest fluence, a mean volume concentration of 3.1 × 1019 and 3.35 × 1019 cm−3 is reached for F and F+ centers, respectively. The F+ emission strongly dominates in the cathodoluminescence of irradiated MgO and its enhancement with fluence is detected. However, the creation efficiency of the F2 aggregate centers is very low and fluence dependence has a complicated shape. Radiation-induced changes of micro-mechanical properties of the same samples have been analysed; the depth profiles of hardening correlate with the ion energy loss. A joint contribution of ionization and impact mechanisms in the formation of structural defects under MgO irradiation with Xe ions is considered.

AB - Accumulation of F-type defects under irradiation of MgO crystals by 0.23-GeV 132Xe ions with fluence varying by three orders of magnitude has been investigated via the spectra of optical absorption and low-temperature cathodoluminescence. The number of single centers continuously increases with fluence without any marks of saturation. At the highest fluence, a mean volume concentration of 3.1 × 1019 and 3.35 × 1019 cm−3 is reached for F and F+ centers, respectively. The F+ emission strongly dominates in the cathodoluminescence of irradiated MgO and its enhancement with fluence is detected. However, the creation efficiency of the F2 aggregate centers is very low and fluence dependence has a complicated shape. Radiation-induced changes of micro-mechanical properties of the same samples have been analysed; the depth profiles of hardening correlate with the ion energy loss. A joint contribution of ionization and impact mechanisms in the formation of structural defects under MgO irradiation with Xe ions is considered.

KW - Depth profile of hardening

KW - Fluence dependence

KW - Magnesium oxide

KW - Optical absorption

KW - Radiation defects

KW - Swift heavy ions

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UR - https://www.scopus.com/pages/publications/85075465445

U2 - 10.1016/j.nimb.2019.11.021

DO - 10.1016/j.nimb.2019.11.021

M3 - Article

SN - 0168-583X

VL - 463

SP - 50

EP - 54

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

ER -

Baubekova G, Akilbekov A, Feldbach E, Grants R, Manika I, Popovs A et al. Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift ¹³²Xe ions. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2020 Jan 15;463:50-54. doi: 10.1016/j.nimb.2019.11.021