Skip to main content
. Author manuscript; available in PMC: 2014 Mar 9.
Published in final edited form as: Inorg Chem. 2008 Mar 17;47(6):1711–1726. doi: 10.1021/ic7016837

Figure 6.

Figure 6

Experimental setup used for single-crystal X-ray absorption experiments. The PS II crystal was placed in a liquid-He cryostat at a temperature of 10 K at ambient pressure. The Mn XANES or EXAFS spectrum was measured as a fluorescence excitation spectrum using a 30-element energy-discriminating solid-state Ge detector placed at 90° to the incident beam. Downstream of the X-ray beam and the PS II crystal is the MAR 345 image-plate detector that was used for obtaining the diffraction pattern from which the orientation matrix of the PS II crystal was determined by indexing the reflections. The incident X-ray beam is defined by the slits in the left foreground, and the I0 ion chamber, which is behind the slits, is used to measure the intensity of the incident beam. A shutter that protects the sample from damage during spectrometer motion is behind the ion chamber and before the cryostat.