Analysing metals within environmental samples using wet chemistry can pose analytical problems, particularly with carbon-based and solid samples. X-ray absorbance spectroscopy (XAS) analysis is one alternative approach, able to target elements of interest whilst avoiding matrix interference from low mass elements (e.g. carbon). One element that is particularly suited to XAS is uranium (U), […]

X-ray absorption spectroscopy (XAS) is an important characterization method but has been carried out mostly at large facilities, limiting the power as a routine characterization for scientific purposes. Therefore, a lot of effort has been put in developing laboratory XAS using x-ray tubes and other sources. Novel compact x-ray sources based on inverse Compton scattering […]

The study of extraterrestrial samples returned from the Moon, asteroids, and via meteorites has the potential to inform problems relating to the oxidation states of multivalent cations and the distribution of oxygen in our Solar System. For more than 25 years, our group has worked to develop XAS methods for analyzing the partial pressure of […]

Spin and oxidation state sensitivity of 3d metal K-edge X-ray Emission Spectroscopy (XES) has been utilized in recent years to successfully probe the ultrafast spin transition and electron transfer processes in femtosecond time-resolved experiments . In this talk I will present the results from a combined time-resolved Fe Kα and Kβ XES and X-ray Solution […]

The presentation will be at 9 am Seattle (Los Angeles) time (UTC-7). To join this meeting, use the link: https://washington.zoom.us/j/99543082366   Sirius is one of the first fourth-generation Synchrotron Light Sources to be built in the world and will have the highest brightness among the light sources in the energy range that goes from soft x-rays to […]