Nagabhushana, H. and Nagabhushana, B M and Premkumar, H B and Lakshminarasappa, B N and Singh, F and Chakradhar, R P S (2009) Raman and infrared study of 100MeV swift Ag8+ heavy ion irradiation effects in CaSO4·2H2O single crystals. Journal of Alloys and Compounds, 482 (1-2). pp. 308-312. ISSN 0925-8388

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The modifications of calcium sulphate (CaSO4·2H2O) single crystals are investigated by means of Raman and Fourier transform infrared spectroscopy (FT-IR) using 100MeV 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 (sigma) 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 v3(SO42−) mode. The decrease in Raman peaks intensity with ion fluence is attributed to degradation of v3(SO42−) modes present on the surface of the sample.

Item Type: Article
Uncontrolled Keywords: Quasi crystals; Electron phonon interactions; Atom Molecule; Ion impact
Subjects: Electronics
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 06 Mar 2012 12:59
Last Modified: 06 Mar 2012 12:59

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