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|Title:||Radioactivity of neutron-irradiated cat's-eye chrysoberyls|
|Authors:||Tang, S.M. |
|Citation:||Tang, S.M., Tay, T.S. (1999-04-02). Radioactivity of neutron-irradiated cat's-eye chrysoberyls. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 150 (1-4) : 491-495. ScholarBank@NUS Repository. https://doi.org/10.1016/S0168-583X(98)01000-3|
|Abstract:||The recent report of marketing of radioactive chrysoberyl cat's-eye in South-East Asian markets has led us to use an indirect method to estimate the threat to health these color-enhanced gemstones may pose if worn close to skin. We determined the impurity content of several cat's-eye chrysoberyls from Indian States of Orissa and Kerala using PIXE, and calculated the radioactivity that would be generated from these impurities and the constitutional elements if a chrysoberyl was irradiated by neutrons in a nuclear reactor for color enhancement. Of all the radioactive nuclides that could be created by neutron irradiation, only four (46Sc, 51Cr, 54Mn and 59Fe) would not have cooled down within a month after irradiation to the internationally accepted level of specific residual radioactivity of 2 nCi/g. The radioactivity of 46Sc, 51Cr and 59Fe would only fall to this safe limit after 15 months and that of 54Mn could remain above this limit for several years.|
|Source Title:||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Appears in Collections:||Staff Publications|
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