J. Phys. IV France 7 (1997) C2-585-C2-586
Atomic Displacement by X-Ray Excitation in NaCl Crystal Containing Cu+ IonsS. Emura1, H. Maeda2 and Y. Kubozono2
1 ISIR, Osaka University, Mihoga-oka 8-1, Ibaraki, Osaka 567, Japan
2 Faculty of Science, Okayama University, Tsushima-naka, Okayama 700, Japan
The x-ray excitation spectra around Cu tf-edge in sodium chloride crystals containing a small amount of Cu+ ions are measured at 1 IK to 200K. We found Cu+ ion displacements and growths to micro-clusters (micro-crystals) of CuCl2 in sodium chloride crystal by x-ray irradiation. The trace of the.formation is presented by observing the XAFS spectra and XEGL (X-ray Excitation Optical Luminescence) intensities at various temperatures. At low temperature below about 50 K, the micro-clusters or the micro-crystals of CuCl2 hardly create. The higher temperature moves the ions faster and further! and makes more active to form the CuCl2 micro-crystals in bulk. The process of moving of the Cu+ ion is discussed.
© EDP Sciences 1997