FIELD: determination of porosity and fluid saturation of sample of oil-bearing rocks. SUBSTANCE: proposed gear includes moderation unit with two spaces lined with material absorbing slow neutrons for sequential installation of sample holder with analyzed sample. Sample holder is composed of cylindrical container with longitudinal axis arranged horizontally for self-centering of sample. Cylindrical container is closed by bottom and cover which forms coincide with section of space. Cover is made of two layers and is composed of material absorbing slow neutrons and of material for biological protection. EFFECT: increased accuracy of radiation test of physical properties of substances, materials and articles. 1 cl, 2 dwg
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