High Resolution Core Level Spectroscopies with the 'Dragon' Beamline

A high resolution soft x-ray synchrotron radiation beamline, dubbed Dragon, has been constructed recently. This beamline, being the spherical version of the cylindrical element monochromator design, has achieved unprecedented resolving power 10,000 in the photon energy range 250-800eV, with superior monochromator transmission. The high spectral resolution of this instrument allows to probe the fine structure and lineshape observed in core level spectroscopies. Many systems have been studied via photoabsorption and photoemission measurements and novel spectroscopic features were observed. These observations give new insights on processes such as core-hole decay, vibronic coupling, crystal field effect and magnetic transition.