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Radioactivity device for measurement of properties of materials

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  • 3. IN RADIOACTIVITY SOURCE-AND-DETECTOR APPARATUS FOR MEASUREMENT OF DENSITY AND SIMILAR PROPERTIES OF FLUIDS IN ROUND PIPES, OF THE TYPE HAVING (A) A SOURCE-HOUSING HAVING THEREIN A GAMMA-RAYEMITTING BODY DIMENSIONED TO FORM ESSENTIALLY A POINT SOURCE. (B) A DETECTOR-HOUSING HAVING THEREIN A GAMMA-RAY DETECTING MEANS AND (C) MEANS FOR MOUNTING THE HOUSINGS ON OPPOSITE SIDES OF A ROUND PIPE, THE IMPROVEMENT CHARACTERIZED BY: (D) THE GAMMA-RAY DETECTING MEANS FORMING A DETECTING AREA HAVING A DIMENSION IN THE PLANE TRANSVERSE TO THE PIPE OF BETWEEN ONE-THIRD AND ONE-AND-ONE HALF TIMES THE DIAMETER OF THE PIPE, AND (E) THE SOURCE-HOUSING HAVING MEANS FOR CONFINING THE SOLID ANGLE OF THE EMITTED RADIATION TO APPROXIMATE COINCIDENCE WITH THE DETECTING AREA.
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