| 摘要 |
Apparatus for analysis of materials in an analysis region comprises one or more sources (not shown) of ionising radiation such as neutrons and detectors (D1 - D12) for resulting emanations. A mean response factor [R] and associated standard deviation sigma R is defined for a plurality of volume cells into which the analysis region is notionally divided. The source(s) and detectors are located geometrically to maximise and minimise sigma R. <IMAGE> |
