Radiation effects in calcite |
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Authors: | K S Raju |
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Institution: | (1) Department of Physics, Madras University Postgraduate Extension Centre, 641004 Coimbatore |
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Abstract: | Calcite single crystals on neutron bombardment change their colour to pale red, red and deep red, as the duration of irradiation
increases. The irradiated surface becomes rugged and on etching, a large number of micropits are observed. Using Vicker’s
hardness indenter, it is observed that the hardress of the irradiated crystal increases with the increase in the total dosage.
From Laue x-ray diffraction studies of irradiated crystals, distortion of lattice is observed. Absorption spectra in the visible
region show an extra peak for irradiated samples which is absent for radiated ones. The radiation effects are annealed to
a considerable extent on heat treatment. The implications are discussed. |
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Keywords: | Etching Vicker’ s hardness numeral (VHN) Laue x-ray diffraction absorption spectra |
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