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  • 2015-2019  (2)
  • 1995-1999  (14)
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  • 1
    Electronic Resource
    Electronic Resource
    Compositional analysis of American southwestern ceramics by neutron activation analysis (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 192 (1995), S. 109-116 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Instrumental neutron activation analysis was used to perform compositional analysis on more than 200 potsherds from prehistoric ceramic pottery collected in or near the Mimbres Valley in New Mexico. Statistical evaluation of the data was used to identify samples of similar origin. Results indicate that at least two sites within the Mimbres heartland and one in the Upper Gilla Valley existed for the production of the characteristic Classic Mimbres pottery. The composition of the clusters of samples identified are described and the significance of the groupings to the archaeology of the region is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037743
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  • 2
    Electronic Resource
    Electronic Resource
    A preliminary screening technique for selected metals at waste sites (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 192 (1995), S. 275-280 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Fast neutron activation analysis (FNAA) was investigated as a possible on-site preliminary screening technique for metal contamination of soil. Two metals, Cu and Zn, were used in a laboratory setting to evaluate the possibility of detecting metal contamination of soil at or below the maximum permissible metal concentration in soil. Varying quantities of compounds of the selected metals were mixed into a prepared soil column for analysis of signal intensity as a function of concentration in the soil. Experiments were conducted with a sealed tube neutron generator and a germanium gamma-ray detector. Both metals produced signal levels distinguishable from background soil concentrations at the maximum permissible level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041731
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  • 3
    Electronic Resource
    Electronic Resource
    Fast neutron activation analysis at Texas A&M University (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 219 (1997), S. 187-190 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Fast neutron generators are used at Texas A & M University to provide a supply of high energy neutrons for nuclear analytical measurements. A series of neutron activation analysis procedures have been developed for determining various major, minor and trace constituents in a variety of materials. These procedures are primarily developed to compliment our reactor based NAA program, thereby expanding the list of determinable elements to include those difficult or impossible to measure using thermal neutrons. A few typical methods are discussed. The unique implementation of the methodologies at Texas A & M are explained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038498
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  • 4
    Electronic Resource
    Electronic Resource
    An anion exchange technique for separation of Na and K for neutron activation analysis of W-Ti alloy (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 234 (1998), S. 71-75 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A radiochemical neutro activation analysis procedure has been developed for the determination of sodium and potassium at parts per billion levels in high purity tungsten/titanium alloy material. The procedure involves the use of an anion exchange separation for purifying sodium and potassium activities from the alloy’s matrix activities,46Sc and187W. In addition, the use of two sequential sample loadings on the resin column prior to elution of the matrix activities has been investigated. Irradiation of 200 mg of the alloy results in a sample of nearly 1 Ci which must be handled in a remote manipulation cell. After acid dissolution of the sample, the sample solution in 1M HF was loaded onto the column. Elution of the sodium and potassium was accomplished using 40 ml of 1M HF. Similar loading and elution of the second sample was followed by the elution of matrix activities with a solution of 1M HF+6M HCl. Extensive tracer experimentation was employed to establish the possibility of retaining the matrix activities on the column while a second sample solution was processed, thus greatly increasing the throughput in terms of the number of samples analyzed per day. The detection limits of Na and K using the method developed are 4.0 ppb and 200 ppb, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02389750
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  • 5
    Electronic Resource
    Electronic Resource
    INAA multielemental analysis of Nigerian bituminous coal and coal ash (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 191 (1995), S. 181-187 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Instrumental neutron activation analysis (INAA) was used to analyzed Nigerian bituminous coal and ash. Good statistical agreement (p≤0.05) between the literature and reported elemental values of USGS AGV-1 sample was found. Many elements were determined in the coal with some enrichment in the coal ash. Arsenic was measured only in the ash while Hg was present only in the coal. Coal ashing at 800°C contributed to a loss of Hg in the ash. Al, Na, Mg, Ti, Fe, which are major elements were found in the coal as expected, with slight enrichment in the ash. Ca and Si were only obtained in the ash. High ash Al (14.9±0.19%) and Si (25.3±4.11%) levels are of concem due to possible cases of pneumononiosis from inhalation of the particulates. Graphical illustration of the lanthanide concentrations peaked at Ce with a decrease from Sm to Lu. U and Th were also present in the samples showing slight enhancement in the ash. Comparatively low coal elemental values, notably S(1.8%), highly advocate this coal as a good quality fuel-coal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035996
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  • 6
    Electronic Resource
    Electronic Resource
    An instrumental neutron activation analysis of 18th century lead-glazed earthenwares from four Spanish missions in Texas (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 196 (1995), S. 207-213 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Instrumental Neutron Activation Analysis (INAA) was used to determine relative manufacturing locales of lead-glazed earthenwares recovered from four Spanish missions in Texas. Two principal clays were distinguished, one containing volcanic ash and one sand. The ceramics characterized by the volcanic ash were believed to have been manufactured in Mexico, while those containing sand were made in Texas. This distinctionis important because it suggests that the Indians at the Texas missions were manufacturing ceramics using Spanish technology such as lead-glazing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038038
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  • 7
    Electronic Resource
    Electronic Resource
    Compton suppression gamma-spectroscopy in the analysis of radium and lead isotopes in ocean sediments (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 236 (1998), S. 261-266 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Compton suppression gamma-spectroscopy provides an efficient method for measuring the concentration of226Ra,228Ra, and210Pb in ocean sediments. The background reduction realized from the suppressed mode of operation provides an “active shield” to allow for the low-level counting required for these measurements. We have used the method to study the possible accumulation of radium from produced waters in sediments from Gulf of Mexico sites of varied distances from drill platforms. In addition,210Pb levels were determined to evaluate the use of our spectrometer for this purpose. Baseline undisturbed concentrations have been obtained from the study of subsurface core material which predates drilling activities. Correlations of radium isotope concentrations with iron and barium provide information concerning the possible relationships between radium levels and drilling activity (excess barium) and natural variations in sediment texture (iron).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02386354
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  • 8
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    A preliminary screening technique for selected metals at waste sites (1995)
    Springer
    Details
    Publication Date: 1995-05-01
    Print ISSN: 0236-5731
    Electronic ISSN: 1588-2780
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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  • 9
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    An instrumental neutron activation analysis of 18th century lead-glazed earthenwares from four Spanish missions in Texas (1995)
    Springer
    Details
    Publication Date: 1995-10-01
    Print ISSN: 0236-5731
    Electronic ISSN: 1588-2780
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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  • 10
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    INAA multielemental analysis of Nigerian bituminous coal and coal ash (1995)
    Springer
    Details
    Publication Date: 1995-03-01
    Print ISSN: 0236-5731
    Electronic ISSN: 1588-2780
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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