| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1622769 | Journal of Alloys and Compounds | 2009 | 5 Pages |
The modifications of calcium sulphate (CaSO4·2H2O) single crystals are investigated by means of Raman and Fourier transform infrared spectroscopy (FT-IR) using 100 MeV Ag8+ ions in the fluence range 1 × 1011 to 5 × 1013 ions/cm2. It is observed that the intensities of the Raman modes decrease with increase in ion fluence. We determined damage cross-section (σ) for all the Raman active modes and found to be different for different Raman modes. Further, FT-IR studies have been carried out to confirm surface amorphisation for a fluence of 1 × 1013 ions/cm2. It is observed that the absorption peaks at 1132–1156 cm−1 corresponds to ν3(SO42−) mode. The decrease in Raman peaks intensity with ion fluence is attributed to degradation of ν3(SO42−) modes present on the surface of the sample.
