Single crystals of Ni were irradiated with 137MeV Xe10+ to fluences of up to 4.9 x 1013/cm2 below 13K. After irradiation, the X-ray cryostat with the specimens was transferred from an irradiation chamber to the X-ray diffraction equipment below 20K. The results of X-ray diffuse scattering near Bragg reflections at low temperature indicate that the defects were located in cascades and suggested that a small amorphous zone exists within the cascade region. During thermal annealing at 40K, corresponding to recovery stage IA, the defects in the cascades rearranged.

Structure of Defect Cascades in Heavy Ion-Irradiated Nickel by X-Ray Diffuse Scattering. H.Maeta, N.Matsumoto, T.Kato, H.Sugai, H.Ohtsuka, M.Sataka: Nuclear Instruments and Methods in Physics Research B, 2006, 242[1-2], 546-9