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Figure 7
Monitoring of the S3 → S0 transition with microsecond resolution by X-ray fluorescence time scans. Main trace: time course of fluorescence (dots) induced by the third flash (arrow) at an excitation energy of 6553 eV (obtained by averaging of 46 transients measured within an interval of ±2 eV around the mean energy of 6553 eV at a resolution of 200 µs per point). The line represents a single-exponential fit to the data with t1/2 = 1.1 ms. The fit-curve starts below the fluorescence level before the flash (dashes). This is explainable by contributions from centers still in the S2 state prior to the flash. [When these centers undergo the S2 → S3 transition upon the third flash, they cause a rapid decrease in the X-ray fluorescence (compare Fig. 2-ii[link]).] Inset: transient at 200 µs per point observed upon the first flash inducing the S1 → S2 transition.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 12| Part 1| December 2005| Pages 35-44
doi:10.1107/S0909049504027803
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