Radiant energy – Geological testing or irradiation
Patent
1979-05-21
1980-11-25
Willis, Davis L.
Radiant energy
Geological testing or irradiation
250461R, G01V 500
Patent
active
042360714
ABSTRACT:
A method for the detection and identification of uranium bearing materials in media found in nature such as rocks, soils, surface and sub-surface waters, vegetation, or in material which has been subjected to physical or chemical processing comprises the steps of: irradiating the media with a light, having a single wavelength or narrow band of wavelengths in the range of about 2400 to 5000A for a time equal to or less than about 100 microseconds; waiting for a period of time, which is dependent on twice the distance of the light-source to the irradiated medium, followed by measurement of the intensity and decay time of the luminescent light emitted by the irradiated media in a narrow spectral range, having a wavelength greater than the wavelength of the light used to irradiate the media. The method is useful for remote geochemical prospecting for uranium using laser induced luminescence and in monitoring products and effluents from installations processing or utilizing uranium compounds, such as in elemental or isotopic separation, purification, recovery and ore beneficiation.
REFERENCES:
patent: 3043908 (1962-07-01), Madsen
patent: 3736428 (1973-05-01), Monroe
patent: 3961187 (1976-06-01), Barringer
Collins D. W.
Exxon Research & Engineering Co.
Matalon Jack
Willis Davis L.
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