Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0168-583X(98)01000-3
Title: Radioactivity of neutron-irradiated cat's-eye chrysoberyls
Authors: Tang, S.M. 
Tay, T.S.
Issue Date: 2-Apr-1999
Source: 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
URI: http://scholarbank.nus.edu.sg/handle/10635/97726
ISSN: 0168583X
DOI: 10.1016/S0168-583X(98)01000-3
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