• Title/Summary/Keyword: mining geology

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A STUDY ON KOREAN ANTHRACITE BY INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS

  • Kim, N.B.;Woo, H.J.;Lee, K.Y.;Hong, W.;Chun, S.K.;Park, K.S.
    • Analytical Science and Technology
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    • v.7 no.4
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    • pp.477-482
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    • 1994

  • By the instrumental neutron activation analysis using two comparators of gold and cobalt, 31 elements have been anlalyzed in anthracites collected from two main coal-fields in Korea. The average concentrations and ranges of the elements were obtained with the elemental difference between two coal-fields. The trends of rare-earth elemental distribution and vertical elemental distribution are also given.

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Hydrogen Depth Profiling by Nuclear Resonance Reaction (공명 핵반응을 이용한 수소적층 분석)

  • Kim, Y. S.;Kim, J. M.;Hong, W.;Kim, D. K.;Cho, S. Y.;Woo, H. J.;Kim, N. B.
    • Journal of the Korean Vacuum Society
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    • v.2 no.4
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    • pp.416-423
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    • 1993

  • Hydrogen depth profiling was performed by H(19F, $\alpha$${\gamma}$) nuclear resonance reactin . A cesium sputtering ion sorce and 1.7MV Tandem Van de Graaff accelerator was used for the production of 6.5MeV 19F ion. The ${\gamma}$ rays produced by the reaction were measure dby 3" $\times$3" and 6" $\times$8" Nal detectors . A test measurement was done for hydrogen contaminatin layer of a bare silicon wafer, Si3N4(H) and Zr(O)a-Si/Si for the purpose of verifying the applicability , detection limit and the reliability of the method.ility of the method.

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