EBSD analysis of strain distribution of sapphire single crystal irradiated with swift heavy ions

Ishikawa, Norito   ; Kondo, Keietsu  ; Fujimura, Yuki; Kitamura, Akane

Radiation damages are induced by swift heavy ions with energy above 1 MeV/u where the energy deposition is mainly done through ionization and electronic excitation process. The previous studies of X-ray diffraction and transmission electron microscopy show that lattice expansion is induced at low fluence, and at high fluence amorphization was induced in single crystalline AlO irradiated with swift heavy ions (e.g. amorphization by irradiation with 160 MeV Xe ions at 3.510 ions/cm). Since the origin of the amorphization is still unclear, it is important to examine the irradiation-induced lattice expansion in detail.