Thermal annealing behavior of α -Al 2 O 3 scintillation screens

S Lederer,S Akhmadaliev,P Forck, E Gutlich, A Lieberwirth,Wolfgang Ensinger

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms（2015）

Cited 4|Views1

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Abstract

Polycrystalline alumina samples (α-Al2O3, purity: 99.8%) were irradiated by 63Cu heavy ions (E=0.5MeV/u) at various fluences. After irradiation, absorption measurements were performed within the wavelength range from 200 to 1000nm 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 ∼0.3eV for temperatures ranging from RT to ∼673K.

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Key words

Alumina,Heavy-ion irradiation,Color center,Thermal annealing,Scintillation screens

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