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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(07) [July 2005] >
| Title: | Low energy gamma-ray spectrometry — A technique for estimation of high grade uranium in geological samples |
| Authors: | Jegannathan, G
Satyamurthy, Padma
Sathyanarayanan, L |
| Keywords: | Low energy gamma ray spectrometry
Uraniferous geological samples
Gamma detector |
| Issue Date: | Jul-2005 |
| Publisher: | CSIR |
| IPC Code: | G01J3/28 |
| 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”  2” 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. |
| Page(s): | 494-502 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.43(07) [July 2005]
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