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Emanation methods

Part C. Emanation Thermal Analysis and other Radiometric Emanation Methods... [Pg.779]

Emanation methods. As shown in the above example radioactivities of the rare gas elements are very easily... [Pg.29]

One application of radioactive tracer techniques of considerable importance in solid state structural problems is the emanation method due to Hahn (21). The method has been employed widely and has been developed recently as a sensitive, quantitative method by Gregory (22), who has employed it for the investigation of structural changes and for the extraction of diffusion data. The procedure in outline is as follows A convenient amount of a radioactive element which decays to an isotope of radon (e.g., radiothorium) is ccprecipitated... [Pg.81]

Chemical analyses were performed in accordance with ASTM Chemical Analysis of Gypsum and Gypsum Products (C 471). Fluoride and phosphorus were determined by the Association of Florida Phosphate Chemists Methods (7). Uranium was determined by ASTM Tests for Microquantities of Uranium in Water by Fluorometry (D 2907), and thorium was determined by ASTM Test Method for Thorium in Water and Waste Water (D 2333). Radium was determined by the radon emanation method (51, and uranium and thorium isotopes were determined by a chromatographic and radiological technique developed by the EPA. [Pg.123]

Douglas. G. S., Ed.. "Radium by Radon Emanation Method." Radioassay Procedures for Environmental Samples, U.S. Public Health Service Publication No. 999-RH27. Rockville. MD. 1967. pp. (4-36H4-45I. [Pg.139]

Total concentrations of trace elements were determined by neutron activation analyses and atomic absorption. Radium concentrations were determined by the emanation method and by the germanium-lithium counting of natural radioactivity, corrected by reference to a National Bureau of Standards (NBS) uranium ore. Chemical analyses were performed by standard methods. [Pg.143]

Radium Analyses—Results of the radium analyses are shown in Table 7. The samples tested by the two different laboratories were identical. EPA analyzed its samples by the emanation method, while the Oak Ridge National Laboratory... [Pg.148]

The emanation method involves the separation of the emanation from the parent radium and measuring the quantity in a special standardized electroscope. The emanation may be removed from solution by boiling or aspiration the most accurate method of testing a solid is to indose it in a container for a month or more and test the emanation which is in equilibrium with the radium present. [Pg.78]

Based on the classical emanation method, it is therefore possible to determine this temperature range, which is of great practical importance since above this approximate temperature the solid-state reaction can occur... [Pg.531]

Balek, V., and J. Tolgyessy, "Emanat ion Thermal Analysts and other Radiometric Emanation Methods, in Wilson and Wilsons Comprehensive Analytical Chemistry, G. Svehla, ed., Vol. XII, Part C., Elsevier, Amsterdam, 1984. [Pg.558]

V. Balek, J. Tolgyessy Emanation thermal analysis and other radiometric emanation methods, (Wilson and Wilson Eds., Comprehensive Analytical Chemistry, Part XIIC, Elsevier, Amsterdam, 1984). [Pg.165]

V. Balek, Z. Malek, A. Clearfield Surface reactivity of high level matrices characterized by radiometric emanation method (Proc. 7th Int. Conference on high level radioactive waste management, Las Vegas, Nevada, 1996) p. 474. [Pg.166]

V. Balek, Z. Malek, A. Clearfield Alteration of nuclear waste glasses characterized by radon emanation method, (Summary of an International Workshop Glass as a waste form and vitrification technology , held at NAS, Washington D.C., May 1996) (NRS Paper E.58) p. 102. [Pg.166]

The apparatus is best calibrated using a radium solution, the activity of which is of the order of magnitude of approximately 10 nCi. The radon -which is in equilibrium - is transferred from the radium solution to the ionization chamber by means of a suitable de-emanation method... [Pg.454]

The determination of radium by the emanation method is based on the production of radon as a decay product of radium. From a liquid sample, the radon is first flushed out with a carrier gas. The end of the flushing is taken as the starting time for fresh radon accumulation in the sample. After a suitable time, the radon reaches equilibrium in the sample... [Pg.4130]


See other pages where Emanation methods is mentioned: [Pg.265]    [Pg.267]    [Pg.129]    [Pg.140]    [Pg.525]    [Pg.525]    [Pg.417]    [Pg.481]   


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