Aggregation and precipitation stages in NaCl:Pb2+ studied by UV absorption |
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| Authors: | Akhilesh K Arora R Kesavamoorthy AK Sood |
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| Institution: | Materials Science Laboratory, Reactor Research Centre Kalpakkam 603 102, India |
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| Abstract: | UV absorption measurements during isochronal annealing of homogenised and as-grown single crystals show two distinct stages in NaCl:Pb2+ where number density of free impurities reduce. With the help of our earlier light scattering results the low temperature stage has been attributed to aggregation of impurity-vacancy dipoles whereas the stage appearing at the higher temperature is assigned to the precipitation process. |
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