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Study of the effect of swift heavy Ni ion irradiation on ruby single crystal by using the XANES and EXAFS techniques |
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| Authors: | D M Bhardwaj D C Jain S Dalela Ravi Kumar N L Saini K B Garg |
| Institution: | a Department of Physics, University of Rajasthan, Jaipur 302004, India b Nuclear Science Center, Aruna Asaf Ali Marg, New-Delhi 110067, India c Dipartimento di Fisica, Universita di Roma “La Sapienza”, 00185, Rome, Italy |
| Abstract: | We have made the XAFS measurements at the Cr–K-edge on natural Indian ruby single crystals (corundum) and its two irradiated samples with fluence 1×1012 Ni6+ and 5×1012 Ni6+ ions/cm2. Irradiated samples show interesting changes in their physical appearance. XANES measurements show progressive decrease in Δoct value on increase of Ni fluence in irradiated samples. EXAFS measurements on these samples show decrease in Cr–O distance on increase of Ni fluence. Lowering of Δoct value is correlated with the increase of Cr–O distance. |
| Keywords: | Ruby Cr-edge XAFS Electronic states |
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