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Figure 18
Graph showing experimental and theoretical values of the effective (i.e. polychromatic) `[\mu t]' from the Beer–Lambert law (Bouguer, 1729BB22; Lambert, 1760BB98; Beer, 1852BB12), in terms of ADC IC current, as a function of ex vacuo filter (Cu) thickness t. These Cu filters were from a Gammex 116 HVL attenuator set, and the in vacuo filter set F5 was used. The grey horizontal lines show the levels from which the first, second and third HVLs can be derived, i.e. ordinate values of −ln[1/2], −ln[1/4] and −ln[1/8]. See text for further details.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 1| January 2017| Pages 110-141
https://doi.org/10.1107/S1600577516015563
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