Hardening in LiF, induced by fast Kr and Ni ions, and recovery of the structure and properties under annealing

Ilze Manika; Janis Maniks; Peters Kulis; Lasma Gailite

doi:10.1117/12.639153

12 June 2006 Hardening in LiF, induced by fast Kr and Ni ions, and recovery of the structure and properties under annealing

Ilze Manika, Janis Maniks, Peters Kulis, Lasma Gailite

Author Affiliations +

Proceedings Volume 5946, Optical Materials and Applications; 59460B (2006) https://doi.org/10.1117/12.639153
Event: Optical Materials and Applications, 2005, Tartu, Estonia

Abstract

The recovery of optical and mechanical properties of LiF crystals irradiated with 790 MeV ⁷⁸Kr and 640 MeV ⁵⁸Ni ions at 10^l2 ions/cm² under annealing at temperatures up to 810 K is investigated. The optical absorbance and depth profiles of hardness before and after annealing were measured. A marked recovery of hardness and change in the optical absorption spectra were observed at temperatures above 520-530 K. An activation energy of 0.15±0.02eV, which is close to that for the thermal migration of H centers, is obtained from the annealing data. The results indicate a significant role of the H-center aggregates in the hardening and annealing processes. The maximum hardening is created and thermally most resistant defects are located around the Bragg maximum, where the threshold energy loss of about 10 keV/nm for track core damage is reached.

Citation Download Citation

Ilze Manika, Janis Maniks, Peters Kulis, and Lasma Gailite "Hardening in LiF, induced by fast Kr and Ni ions, and recovery of the structure and properties under annealing", Proc. SPIE 5946, Optical Materials and Applications, 59460B (12 June 2006); https://doi.org/10.1117/12.639153

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