In Situ X-Ray Diffraction and XAFS Studies of Expanded Fluid Selenium Using Synchrotron Radiation

摘要

In situ x-ray-diffraction and XAFS measurements for fluid Se at high tem- peratures and pressures have been car- ried out using synchrotron radiation at Spring-8 and ESRF for the first time. The Quality of the measured x-Ray-diffraction Spectra becomes much better than those From previous studies using in-house x- Ray sources. The preservation of the Chain structure and the contraction of The covalent bonds are reconfirmed in The SC-M transition.