Fig. 10-7 The SR beamline for unsealed radioactive materials. A synchrotron radiation (SR) beamline has been completed for research on unsealed radioisotope (RI) and actinide materials. It is now performing users' experiments.

Fig. 10-8 The EXAFS spectrum around the uranium L3-absorption edge of uranium dioxide (UO2). *EXAFS; Extended x-ray Absorption Fine Structure. Techniques for beamline construction and safe operation were established to study unsealed radioactive materials.

The SR beamline was constructed for unsealed radioisotope and actinide materials research at the Photon Factory of KEK. It is the first beamline completed in Japan for this purpose. This work has been part of the R&D program for the SPring-8 Project. It was undertaken jointly by JAERI and RIKEN. The beamline is divided into two branch lines, one for soft x-ray (1.8-6 keV) experiments and the other for hard x-ray (4-20 keV) experiments. An example of experimental results, Fig. 10-8 shows the EXAFS spectrum around the uranium L3-absorption edge of uranium dioxide (UO2).

Reference K. Kobayashi, Beamline for radioactive materials studies, Photon Factory Activity Report #10, 1-2 (1992).

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