Effect of point defects on the STE luminescence of CaF2 single crystals

A. Batool; M. Izerrouken; M. V. Sorokin; S. O. Aisida; M. Mushtaq; Ja Hussain; I. Ahmad; M. Q.A. Malik; A. Faridi; Ting kai Zhao

doi:10.1080/10420150.2022.2133712

Effect of point defects on the STE luminescence of CaF₂ single crystals

A. Batool, M. Izerrouken, M. V. Sorokin, S. O. Aisida, M. Mushtaq, Ja Hussain, I. Ahmad, M. Q.A. Malik, A. Faridi, Ting kai Zhao

School of Materials Sience and Engineering

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

Abstract

The study is devoted to the radiation defects created in the calcium fluoride single crystals with reactor irradiation to the fluence of 3.7 × 10¹⁷ thermal and 4.6 × 10¹⁷ fast (E_n > 1 MeV) neutrons per cm², and their effect on the luminescence of the crystals. UV–VIS absorption spectroscopy revealed the formation of point defects, mainly F and F₂ centers. From the comparison of the annealing behavior of the absorption and the ion-beam-induced luminescence (IBIL), we conclude that the color centers are responsible for a non-radiation decay of self-trapped excitons (STEs) and thus cause the luminescence quenching. In addition, the Raman analysis revealed a disorder of about 44% and a stress formation in the material after the neutron irradiation. Annealing at 100 °C reduces the disorder to 13% and eliminates the stress.

Original language	English
Pages (from-to)	314-324
Number of pages	11
Journal	Radiation Effects and Defects in Solids
Volume	178
Issue number	3-4
DOIs	https://doi.org/10.1080/10420150.2022.2133712
State	Published - 2023

Keywords

CaF
color centers
Fast neutrons
ionoluminescence
scintillator
thermal annealing

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10.1080/10420150.2022.2133712

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title = "Effect of point defects on the STE luminescence of CaF2 single crystals",

abstract = "The study is devoted to the radiation defects created in the calcium fluoride single crystals with reactor irradiation to the fluence of 3.7 × 1017 thermal and 4.6 × 1017 fast (En > 1 MeV) neutrons per cm2, and their effect on the luminescence of the crystals. UV–VIS absorption spectroscopy revealed the formation of point defects, mainly F and F2 centers. From the comparison of the annealing behavior of the absorption and the ion-beam-induced luminescence (IBIL), we conclude that the color centers are responsible for a non-radiation decay of self-trapped excitons (STEs) and thus cause the luminescence quenching. In addition, the Raman analysis revealed a disorder of about 44% and a stress formation in the material after the neutron irradiation. Annealing at 100 °C reduces the disorder to 13% and eliminates the stress.",

keywords = "CaF, color centers, Fast neutrons, ionoluminescence, scintillator, thermal annealing",

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doi = "10.1080/10420150.2022.2133712",

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T1 - Effect of point defects on the STE luminescence of CaF2 single crystals

AU - Batool, A.

AU - Izerrouken, M.

AU - Sorokin, M. V.

AU - Aisida, S. O.

AU - Mushtaq, M.

AU - Hussain, Ja

AU - Ahmad, I.

AU - Malik, M. Q.A.

AU - Faridi, A.

AU - Zhao, Ting kai

PY - 2023

Y1 - 2023

N2 - The study is devoted to the radiation defects created in the calcium fluoride single crystals with reactor irradiation to the fluence of 3.7 × 1017 thermal and 4.6 × 1017 fast (En > 1 MeV) neutrons per cm2, and their effect on the luminescence of the crystals. UV–VIS absorption spectroscopy revealed the formation of point defects, mainly F and F2 centers. From the comparison of the annealing behavior of the absorption and the ion-beam-induced luminescence (IBIL), we conclude that the color centers are responsible for a non-radiation decay of self-trapped excitons (STEs) and thus cause the luminescence quenching. In addition, the Raman analysis revealed a disorder of about 44% and a stress formation in the material after the neutron irradiation. Annealing at 100 °C reduces the disorder to 13% and eliminates the stress.

AB - The study is devoted to the radiation defects created in the calcium fluoride single crystals with reactor irradiation to the fluence of 3.7 × 1017 thermal and 4.6 × 1017 fast (En > 1 MeV) neutrons per cm2, and their effect on the luminescence of the crystals. UV–VIS absorption spectroscopy revealed the formation of point defects, mainly F and F2 centers. From the comparison of the annealing behavior of the absorption and the ion-beam-induced luminescence (IBIL), we conclude that the color centers are responsible for a non-radiation decay of self-trapped excitons (STEs) and thus cause the luminescence quenching. In addition, the Raman analysis revealed a disorder of about 44% and a stress formation in the material after the neutron irradiation. Annealing at 100 °C reduces the disorder to 13% and eliminates the stress.

KW - CaF

KW - color centers

KW - Fast neutrons

KW - ionoluminescence

KW - scintillator

KW - thermal annealing

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U2 - 10.1080/10420150.2022.2133712

DO - 10.1080/10420150.2022.2133712

M3 - 文章

AN - SCOPUS:85140368769

SN - 1042-0150

VL - 178

SP - 314

EP - 324

JO - Radiation Effects and Defects in Solids

JF - Radiation Effects and Defects in Solids

IS - 3-4

ER -

Effect of point defects on the STE luminescence of CaF₂ single crystals

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