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Title
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Radio-isotope neutron activation analysis for vanadium, manganese and tungsten in alloy steels
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Author
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Abstract
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| An instrumental neutron activation method for V, Mn and W in alloy steels with a 241 Am/Be isotopic neutron source is described. The samples were irradiated to induce the nuclear reactions 51V(n, γ) 52V, 55Mn(n, γ)56Mn, and 186W(n, γ)187W. The activities were measured with a NaI(TI) detector. Interferences on the measured photopeaks were shown to be negligible by measuring the half-lives of 62V, 56Mn and 187W.These thre elementes were determined in the range 1.512.9% in special steels; manganese in the range 0.51.6% was measured in cast irons. Calibration was done by comparison with results from wet chemistry and x-ray fluorescence spectrometry. The processing times for the vanadium, manganese and tungsten determinations were 11 min, 3 h and 26.3 h, respectively, but these were reduced greatly by intoruding a scheme wherein six samples were simultaneously irradiated and the 56Mn and 187W nuclides were measured sequentially for a series of 66 samples. The average processing time was reduced to 45 min for tungsten with a precision of 4.0% and accuracy of 3.4% and 22.8 min for manganese with a precision of 3.8% and accuracy of 3.1%. |
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Language
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English
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Source (journal)
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Analytica chimica acta. - Amsterdam, 1947, currens
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Publication
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Amsterdam
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1987
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ISSN
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0003-2670
[print]
1873-4324
[online]
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DOI
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10.1016/S0003-2670(00)83107-4
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Volume/pages
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196
(1987)
, p. 337-343
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ISI
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A1987K058900044
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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