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Figure 7
Calculated small beam enhancement, defined as the ratio of the total energy deposited in the crystal relative to that actually deposited in the beam volume, as a function of the beam diameter for incident X-ray energies of 8.1 keV (dashed line), 12.7 keV (unbroken line) and 15 keV (dotted line). The inset shows the calculated deposited energy density per generated 12.7 keV photoelectron as a function of radius for a 20 µm thick sample illuminated by a 1 µm diameter beam. On average, 12.1 keV is deposited in the whole crystal but only 1.4 keV of this is contained within the illuminated volume (indicated by the shading).

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
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