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Tuesday, August 4, 2020 | History

2 edition of Graphical Determination of Uranium and Thorium in Ores From Their Gamma-Ray Spectra. found in the catalog.

Graphical Determination of Uranium and Thorium in Ores From Their Gamma-Ray Spectra.

Canada. Dept. of Mines and Technical Surveys. Mines Branch.

Graphical Determination of Uranium and Thorium in Ores From Their Gamma-Ray Spectra.

by Canada. Dept. of Mines and Technical Surveys. Mines Branch.

  • 263 Want to read
  • 12 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

SeriesCanada Mines Branch Research Report -- 46
ContributionsHorwood, J.L.
ID Numbers
Open LibraryOL21895681M

  A rapid, simple and non-destructive method was developed for the determination of thorium, uranium by gamma ray spectrometry (high purity Ge detector) in thorium–uranium mixture. Using the calibration curves, thorium and uranium were analyzed in synthetic samples with RSD ~2 %. Inter element effect suggested that and keV gamma lines are more suitable for the determination Cited by: 8. Thorium. Thorium is an element that occurs naturally in the earth's crust. The only naturally occurring isotope of thorium is Th and it is unstable and radioactive. According to Adams and Gasparini () thorium is chemically stable in the tetravalent ion state under reducing conditions, has a large ionic radii, a high coordination number (8) with respect to oxygen, and complete outermost.

and Investigations of Environmental Radioactivity Po 84 Lu metal, thorium lantern mantles, and old uranium ore samples. The geology department will have uranium, thorium, and potas-sium minerals. Polly Peterson for their critical and timely review of this book. Physical, nuclear and chemical properties of Uranium; Introduction to the uranium cycle - uranium ore dressing and concentrate production - uranium purification, conversion into UF6 and fuel element preparation - reprocessing of irradiated fuel; Enrichment determination: techniques and software - method with intrinsic calibration.

UCRL-ID- U A Gamma Ray Analysis Code for Uranium Isotopic Determination DeLynn Clark December may not be those of the Laboratory. Work performed under the auspices of the ment of Energy by the Lawrence Livermore National Laboratory under Contract W Cited by: environmental samples with different uranium isotopic ratios. Key words: Uranium isotopic ratio, gamma-ray spectrometry 1. INTRODUCTION Uranium is a rare earth element found in the earth’s crust with an average of 3 ppm. Natural uranium is a mixture of three radioactive isotopes U (%File Size: KB.


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Graphical Determination of Uranium and Thorium in Ores From Their Gamma-Ray Spectra by Canada. Dept. of Mines and Technical Surveys. Mines Branch. Download PDF EPUB FB2

A radiometric method for the analysis of uranium and thorium ores is described. Three bands in the gamma spectra are selected. In the first one are counted gamma rays from 52 to keV with a 1 3 4 ″ dia. × 1 4 ″ thick NaI(Tl) crystal.

Gamma rays falling in the second (from to keV) and in the third (from to MeV) band are counted with a 3″ dia. × 3″ thick by: 2. uranium ore activity in Brazil were analyzed. The efficiency curve determined by Olivares, D.

() was used for quantifying the amount of uranium, thorium and potassium in both samples. This paper presents the results of a pilot experiment aimed at standardizing procedures from the Research Center in. Determination of uranium and thorium using gamma spectrometry: a pilot study. Determination of uranium and thorium using.

which establishes the relation between gamma-ray energies and the. Eight sources of uranium of varying /sup /U enrichment were used to collect ay spectra with a GeLi detector over the energy range from 50 to keV.

The characteristic x rays of thorium and uranium were identified. Included in the spectra. rays present in the decay of the, and uranium isotopes.

The application of various physical methods to the assay of uranium and thorium in ores is discussed.

It is shown how it is possible to determine their uranium and thorium content by means of. In this work the presence of uranium in the monazite sample is identified by the gamma-ray peak at keV and for thorium the identification is based on the gamma-ray peaks at, and keV.

These gamma-ray peaks were selected to avoid interference with other peaks in the gamma- ray by: spectra, elemental concentrations were determined for thorium (range from ×10−3 to µg g−1), uranium (from ×10−4 to µg g−1) and potassium (from ×10−4 to %).

The arithmetic mean values (A.M. ± S.D.) calculated from all samples are. Gamma Spectra of Thorium Ores Thorianite Gamma spectrum of Thorianite Thorianite Ore. The thorianite is a mineral containing thorium, from which it takes its name.

It is found in pegmatites and in alluvial deposits. There are clear peaks corresponding to major descendants of Thorium: Pb, Ac and Tl Monazite Monazite gamma Spectrum Monazite.

A basic characterization of uranium samples was performed using gamma- and X-ray spectroscopy. The studied uranium samples were eight types of certified reference materials with U enrichments in the range of 1–97%, and the measurements were performed over 24 h using a high-resolution and high-purity planar germanium by: 3.

Gamma rays emitted by uranium and thorium in the energy range 10– keV. the low energy gamma ray lines from uranium and thorium might well overlap X-lines and confuse interpretation of the observations.

To assist in the understanding of the low energy regions of y-ray spectra and X-ray spectra obtained in the presence of a measurable Cited by: Introduction Gamma-ray spectrometry has been extensively used for the identification of uranium and thorium`) and for the absolute determination of uranium content in rock samplesZ-4), decays through a series of daughter products, several of which emit gamma rays thereby producing a characteristic spectrum which can, under the equilibrium conditions, lead to information regarding its Cited by: 9.

Methods are described for the simultaneous determination of uranium and thorium in basaltic rocks at concentrations from mg kg–1(ppm) to µg kg–1(ppb) levels and for uranium in solution at. Manual of Analytical Methods for the Determination of Uranium and Thorium in Their Ores on *FREE* shipping on qualifying cturer: Atomic Energy Commission.

To Download the Gamma Spectrum data, select from the alphabetical list below. View Complete Catalog in Browser >> ( pages) get Acrobat. Shales are the most common radioactive lithology that is seen on a gamma-ray log.

However, other lithogies can generate high gamma-ray readings and their expected API values can be computed by applying the multipliers to analyses of thorium (ppm), uranium (ppm), and potassium (%), where these are available.

A new approach for the determination of elemental uranium in uranium bearing ore, using high resolution γ-ray spectrometry, was applied. Using a variant of the enrichment technique an agreement of better than 1% has been obtained between γ-ray measurement results and a certified value obtained by other analytical : M.

Bickel, W. Nagel, F. Quik. Gamma-ray characteristics Gamma rays are the highest-energy form of electromagnetic radiation, being physically the same all other forms (e.g., X rays, visible light, infrared, radio) but having higher photon energy due to their shorter wavelength.

Because of this, the energy of gamma-ray photons can be resolved individually, and a gamma-File Size: 2MB. Determination of Uranium and Thorium in Soil and Plant Parts Downloaded By: [TÜBTAK EKUAL] At: 14 October for an uncontaminated area, ¡ and ¡ mg kg.

The variations in the shapes of the potassium, uranium and thorium gamma-ray spectra were determined from measurements on large radioactive concrete pads, using plywood sheets to simulate a.

Gamma-spectrometric determination of U in uranium-bearing materials Jozsef Zsigrai1, Tam Cong Nguyen2, but is formed during the irradiation of uranium or thorium in a nuclear reactor. For the studies presented in this paper spectra were taken with 4 different HPGe detectors at 4 different locations (see Table 1).Cited by: 6.

A routine procedure has been developed for the simultaneous determination of uranium and thorium in high concentration thorium ores. INAA is used to determine the uranium and thorium concentration. However, for very low concentrations of uranium a radiochemical procedure based on the use of NPy/benzene as an extractant has to be employed.

The precision and accuracy of the method Author: S. Ahmad, A. Mannan, I. H. Qureshi.The red line is the gamma spectrum of a sample of the uranium ore uraninite, all the uranium decay chain isotopes shows their gamma photo peaks (at least the ones which are gamma emitters).

The descendants of radium Ra Pb and Bi are present.A high-purity Germanium (HPGe) detector was used to obtain high-resolution spectra of gamma-ray emissions from 3 uranium sources: a highly enriched uranium (HEU) source, a uranium ore source, and a uranyl acetate source.

(The activities and isotopic compositions of these sources are .