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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Environmental monitoring and assessment 47 (1997), S. 303-313 
    ISSN: 1573-2959
    Keywords: absolute ; comparator ; K_o
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Ko factor method in neutron activation analysis adopts all the principles of comparator method and can be used for the rapid determination of elemental comcentrations during routine monitoring of environmental samples. The method necessiates the use of same in-pile conditions, such as irradiation time, irradiation position and the type of neutron spectrum, for which the factors have been generated. The K_o factors were estimated for various elements of environmental importance for three irradiation positions of Apsara Reactor at Bhabha Atomic Research Centre. Standard reference materials of soil and coal were used for all the elements except for Hg for which HgCl2 was used. The concentration of the elements determined using these factors in a flyash standard reference material revealed good agreement within 10% of the certified values. The efficacy of the method compared well with that of specific element comparator method as revealed by the elemental concentrations obtained by both the techniques.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Environmental monitoring and assessment 40 (1996), S. 253-259 
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The nature of atmospheric aerosols at Gurushikar, Mt. Abu, Rajasthan where a gamma ray telescope is to be installed, was investigated. Air particulate samples collected on filters were used to estimate the total suspended particulate matter (TSPM) and its elemental composition. The TSPM varied from 31 to 103 μg/m3 during January to March 1994. The heighest loads were observed during the months of May and June (80–100 μg/m3) and lowest during October (20–60 μg/m3). The dust was also examined for size, shape and nature of the mineral matter. The particle sizes varied from 100 μm to 5 μm. The course particles (〉50 μm) are irregular shaped quartz grains. Some of the medium size (=50 μm) particles were spherical and were highly conducting. These particles were rich in iron content. Correlation coefficients among various elements in the dust showed that it is made up of mainly two components-wind blown ground dust and particulate arising out of wood and coal burning.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 6 (1977), S. 192-195 
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: X-ray emission intensities (number of X-ray photons per 100 disintegrations) have been computed from gamma ray intensities, internal conversion, electron capture coefficients of the radionuclides and the fluorescence yields of the daughter products of various radionuclides normally observed in fallout from nuclear explosions. X-ray spectrometry of these radionuclides would supplement the information, currently being obtained by radiochemical separation and subsequent radioactive counting, gamma ray spectrometry of fallout samples using NaI(T1) or Ge(Li) detectors and multichannel analysers. No results are so far available in the literature based on X-ray spectrometry of radionuclides in fallout because of non-availability or scanty data on X-ray emission intensities of various radionuclides.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 9 (1980), S. 159-162 
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The emission intensities of K X-rays from a number of activation products have been calculated from the known absolute γ intensities, K capture data and internal conversion coefficients of the radionuclides and the fluorescence yields of the daughter products. The calculated X-ray intensities of a few isotopes are compared with those experimentally reported. The X-ray spectrometry of activation products could usefully supplement the γ-ray spectrometry in the instrumental neutron activation analysis and in such cases the data presented here will be of value.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 1996-05-01
    Print ISSN: 0167-6369
    Electronic ISSN: 1573-2959
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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