High-temperature scintillation of alumina under 32 MeV 63Cu5+ heavy-ion irradiation


High-temperature scintillation of alumina under 32 MeV 63Cu5+ heavy-ion irradiation

Lederer, S.; Akhmadaliev, S.; von Borany, J.; Gütlich, E.; Lieberwirth, A.; Zimmermann, J.; Ensinger, W.

Polycrystalline alumina samples (α-Al2O3, purity: 99.8%) were irradiated with 63Cu5+63Cu5+ ions of 32 MeV kinetic energy (≈0.5 MeV/u) up to fluences of 1E14 ions/cm2 at various temperatures ranging from 295 to 973 K. Ion beam induced luminescence and emission spectra were monitored at wavelengths from 320 to 800 nm. Optical absorption measurements were performed to deduce color center formation. Results were evaluated by the Birks model to determine the material’s radiation hardness. The applicability of alumina as scintillation screens for ion beam diagnostics could be extended by enhanced temperature operation. Analysis of the emission spectra shows a complex color center formation behavior as a function of fluence and temperature.

Keywords: Alumina; Heavy-ion irradiation; Scintillation yield decrease; High-temperature scintillation; Thermal annealing

Related publications

Permalink: https://www.hzdr.de/publications/Publ-22384
Publ.-Id: 22384