Abstract

Trace element analysis of 60 Burmese and Thai rubies by using the technique of proton-induced x-ray emission was carried out. It was found that the Burmese rubies contained higher concentrations of all impurities except iron. Our results also reveal that vanadium and iron are useful indicators for Burmese and Thai ruby attribution. The Thai rubies have high contents of iron and very low concentrations of vanadium. On the other hand, all the Burmese rubies examined contain significant amounts of vanadium, and their iron contents are, on the average, four times lower than those in the Thai rubies.

Fast fluorescent imaging-based Thai jasmine rice identification with polynomial fitting function and neural network analysis

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Appl. Opt. 53(10) 2206-2212 (2014)

Synthetic Maser Ruby

Robert D. Olt
Appl. Opt. 1(1) 25-32 (1962)

The Effects of Scattering and Mirror Reflectivity on the Performance of a Ruby Laser

J. G. Edwards
Appl. Opt. 6(6) 1011-1022 (1967)

Demonstration of a single-wavelength spectral-imaging-based Thai jasmine rice identification

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Appl. Opt. 50(21) 4024-4030 (2011)

Immersion Liquids for Ruby Lasers

M. E. Graham, B. I. Davis, and D. V. Keller
Appl. Opt. 4(5) 613-615 (1965)