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Measurement of moisture and hydrogen contents by intermediate neutron moderation

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Abstract

An intermediate neutron moderation method for measurement of moisture and/or hydrogen contents of small samples is presented. The sample is placed on the top face of a neutron howitzer, with a cadmium sheet between. Thermal neutrons resulting from intermediate neutron moderation in the sample are detected with a3He proportional counter placed on the sample, by a cadmium difference method. With a 500 mCi Am-Be neutron source, the limit of moisture detection for a 10×20×1.8 cm3 asbestos plate in 1 min count time is 0.5 wt.%. The precision of measuring the hydrogen contents of 250 ml hydrocarbons containing 112 mg H/ml is 0.9% under the same conditions.

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Authors and Affiliations

  1. Radioisotope Center, Japan Atomic Energy Research Institute, Öarai-machi, Ibaraki-ken, (Japan)

    N. Wada

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  1. N. Wada
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Wada, N. Measurement of moisture and hydrogen contents by intermediate neutron moderation. J. Radioanal. Chem. 23, 147–158 (1974). https://doi.org/10.1007/BF02514353

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  • DOI: https://doi.org/10.1007/BF02514353

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