Photoinduced H1b and H1c centers in some natural treated diamonds |
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| Authors: | E Gaillou E Fritsch F Notari |
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| Affiliation: | 1. Department of Mineral Sciences, Smithsonian Institution, Washington, DC 20560, USA;2. Université de Nantes, CNRS, Institut des Matériaux Jean Rouxel (I.M.N.), UMR 6502, 2 rue de la Houssinière, B.P. 32229, Nantes, F-44000 France;3. GemTechLab, rue Chantepoulet, 1201 Geneva, Switzerland |
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| Abstract: | Three natural, treated-color diamonds present photoinduced H1b/H1c centers after UV exposure. As the H1b/H1c absorptions increase, that of the 595 nm center decreases. Recovery occurs by simple exposure to a standard incandescent 100 W lamp. The centers implied are all related to nitrogen and to the existence of a treatment, the formation of H1b/H1c centers coming from the trapping of the 595 nm center. The photoinduced behavior seems to confirm the close relation between the 595 nm center and the H1b/H1c centers, and might help in gemological identification. |
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