Recrystallization kinetics of amorphous tracks and homogeneous layers in LiNbO3 irradiated with swift heavy ions.
poster presentation: Tuesday 2010-08-24 05:00 PM - 07:00 PM in section Irradiation effects in insulators and nuclear materials
Last modified: 2010-06-02
Abstract
In this work we report on a systematic study of the recrystallization behaviour of amorphous tracks (4 nm radius) created by swift heavy ion irradiation (Br 45 MeV) in LiNbO3. Annealing treatments have been performed at various temperatures in the 200-350ºC range and the kinetics of the recovery process has been obtained. From Arrhenius plot the activation energy of the process has been obtained. Systematic characterization has been performed by means of RBS-c measurements and optical reflectance/transmitance measurements. An epitaxial-like regrowth behaviour has been found, showing two clear kinetics regimes. A microscopic model has been developed in the framework of the Kolmogorov-Johnson-Mell-Avrami (KJMA) theory. The recrystallization of homogeneous amorphous layers produced by F 20 MeV irradiations have also been studied showing that the same basic regrowth kinetics. This fundamental study is useful for optimization of optical applications produced with swift heavy ions.
To our knowledge this is the first work addressing specifically the recovery of latent amorphous tracks produced by the electronic damage of swift heavy ions.
Author(s) affiliation:
Miguel Crespillo, ,
Olga Caballero-Calero, ,
Nuria Gordillo, ,
Antonio Rivera, ,
Fernando Agulló-López, ,
*presenting author