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Thermal annealing behavior of α-Al2O3 scintillation screens

Lederer, S. and Akhmadaliev, S. and Forck, P. and Gütlich, E. and Lieberwirth, A. and Ensinger, Wolfgang (2015):
Thermal annealing behavior of α-Al2O3 scintillation screens.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 365 (Part B), pp. 548-552. Elsevier ScienceDirect, ISSN 0168-583X,
DOI: 10.1016/j.nimb.2015.08.024,
[Article]

Abstract

Polycrystalline alumina samples (α-Al2O3, purity: 99.8%) were irradiated by 63Cu heavy ions (E = 0.5 MeV/u) at various fluences. After irradiation, absorption measurements were performed within the wavelength range from 200 to 1000 nm to evaluate color center evolution. Thermal annealing behavior of the created defects was investigated with respect to annealing temperature and duration. Complex color center formation processes depending on particle fluence and temperature could be observed. Calculated activation energies necessary for F- and F+-center migration are ~0.3 eV for temperatures ranging from RT to ~673 K.

Item Type: Article
Erschienen: 2015
Creators: Lederer, S. and Akhmadaliev, S. and Forck, P. and Gütlich, E. and Lieberwirth, A. and Ensinger, Wolfgang
Title: Thermal annealing behavior of α-Al2O3 scintillation screens
Language: English
Abstract:

Polycrystalline alumina samples (α-Al2O3, purity: 99.8%) were irradiated by 63Cu heavy ions (E = 0.5 MeV/u) at various fluences. After irradiation, absorption measurements were performed within the wavelength range from 200 to 1000 nm to evaluate color center evolution. Thermal annealing behavior of the created defects was investigated with respect to annealing temperature and duration. Complex color center formation processes depending on particle fluence and temperature could be observed. Calculated activation energies necessary for F- and F+-center migration are ~0.3 eV for temperatures ranging from RT to ~673 K.

Journal or Publication Title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Journal volume: 365
Number: Part B
Publisher: Elsevier ScienceDirect
Uncontrolled Keywords: Alumina, Color center, Heavy-ion irradiation, Scintillation screens, Thermal annealing
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
Date Deposited: 04 Dec 2015 14:04
DOI: 10.1016/j.nimb.2015.08.024
Official URL: http://www.sciencedirect.com/science/article/pii/S0168583X15...
Additional Information:

Part of special issue: Swift Heavy Ions in Matter, 18-21 May, 2015, Darmstadt, Germany

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