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|Title:||Low energy gamma-ray spectrometry — A technique for estimation of high grade uranium in geological samples|
|Keywords:||Low energy gamma ray spectrometry|
Uraniferous geological samples
|Abstract:||Low Energy Gamma-Ray Spectrometry (LEGS) has been proved to be a rapid technique for analyzing high-grade uranium in geological samples. From the low energy portion between (40-400 keV) of the gamma-ray spectrum of uranium and thorium series, the contents of uranium, its daughter radium (eq), and thorium are determined. This gives significant information about the geochemical anomalies. A standard gamma ray spectrometer with a 1¾<sup>”</sup> <img src='/image/spc_char/cross.gif' border=0> 2<sup>”</sup> well type NaI (Tl) gamma detector constitutes the instrumentation requirements of this technique. Sample weighing about a few grams in a glass vial is used for analysis. A detailed study on the contribution of uranium daughter’s energies in gamma spectrum of uranium has made the system more efficient for analyzing high grade (20%) uraniferous samples. Minimum personal exposure and an excellent correlation of uranium values with the chemical results have made this technique a versatile one in high-grade uranium exploration programme. This paper deals with problems faced by the conventional methods that is Beta-Gamma and High Energy Gamma-Ray Spectrometry used for determining the contents of uranium and thorium in high-grade uraniferous geological samples and the advantage of this technique over them.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.43(07) [July 2005]|
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