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dc.contributor.authorD. Bootkulen_US
dc.contributor.authorC. Chaiwaien_US
dc.contributor.authorU. Tippawanen_US
dc.contributor.authorB. Wanthanachaisaengen_US
dc.contributor.authorS. Intarasirien_US
dc.description.abstract© 2015 Elsevier B.V. Blue sapphire is categorised in a corundum (Al2O3) group. The gems of this group are always amazed by their beauties and thus having high value. In this study, blue sapphires from Rwanda, recently came to Thai gemstone industry, are chosen for investigations. On one hand, we have applied Particle Induced X-ray Emission (PIXE), which is a highly sensitive and precise analytical technique that can be used to identify and quantify trace elements, for chemical analysis of the sapphires. Here we have found that the major element of blue sapphires from Rwanda is Al with trace elements such as Fe, Ti, Cr, Ga and Mg as are commonly found in normal blue sapphire. On the other hand, we have applied low and medium ion implantations for color improvement of the sapphire. It seems that a high amount of energy transferring during cascade collisions have altered the gems properties. We have clearly seen that the blue color of the sapphires have been intensified after nitrogen ion bombardment. In addition, the gems were also having more transparent and luster. The UV-Vis-NIR measurement detected the modification of their absorption properties, implying of the blue color increasing. Here the mechanism of these modifications is postulated and reported. In any point of view, the bombardment by using nitrogen ion beam is a promising technique for quality improvement of the blue sapphire from Rwanda.en_US
dc.subjectPhysics and Astronomyen_US
dc.titleAnalysis and modification of blue sapphires from Rwanda by ion beam techniquesen_US
article.title.sourcetitleNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atomsen_US
article.volume365en_US Universityen_US Mai Universityen_US Universityen_US
Appears in Collections:CMUL: Journal Articles

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