Matthew Marcus: Soft x-ray spectromicroscopy in extraterrestrial materials
Extraterrestrial materials such as meteorites and interplanetary dust particles are often very complex and non-uniform, with diverse species within a small sample. In some cases, especially for the products of sample-return missions, the available samples are small and precious. X-ray micro- and nano-spectroscopy are ideal complements to other methods such as TEM and nano-SIMS. In […]
Andy Aquila: The Tender X-ray Imaging (TXI) instrument at the LCLS
This presentation will take place at 6 pm Monday, Seattle (Los Angeles) time / 9 am Tuesday, Beijing time using Zoom. For the Zoom link and password, visit https://tinyurl.com/XAFStalks within 30 minutes of the beginning of the presentation. The Linac Coherent Light Source (LCLS) upgrade to a high repetition source offers new avenues to pump/probe […]
Thomas Penfold: Towards the Rapid Analysis of XANES for Complex Systems using Deep Neural Networks
X-ray spectroscopy delivers strong impact across the physical and biological sciences by providing end users with highly detailed information about the electronic and geometric structure of matter. To decode this information in challenging cases, e.g., in operando catalysts, batteries, and temporally evolving systems , advanced theoretical calculations are necessary. The complexity and resource requirements often […]
Liang Zhang: In situ/operando XAS for energy storage materials
Rechargeable batteries (Li-ion batteries and beyond) have received extensive attention as powerful boosters for the development of human society. However, the application of rechargeable batteries is still hindered by low energy density, serious voltage hysteresis, and long-term degradation. Therefore, it is of great importance for understanding the underlying redox reaction and capacity fading mechanisms to […]
Susan Cumberland: Determining uranium geochemistry within natural organic-matter rich environments using XAS and XFM techniques
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), […]
Juanjuan Huang: Energy Dispersive X-ray Absorption Spectroscopy at the Munich Compact Light Source
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 […]
M. Darby Dyar: Application of Multivariate Analysis Techniques to Quantitative Interpretation of Valence States in XAS
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 […]
Kristjan Kunnus: Probing of coherent nuclear wavepacket dynamics with X-ray emission and scattering in solvated Fe photosensitizers
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 […]
Helio Tolentino and Others: Spectroscopy and New Scientific Opportunities at SIRIUS, part I
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 […]
Wolfgang Malzer: Principles and applications of laboratory XAS with graphite crystal von Hamos spectrometers
The presentation will be at 9 am Seattle (Los Angeles) time (UTC-7). To join this meeting, use the Zoom links as sent by Jerry Seidler
Santiago Figueroa: Spectroscopy and New Scientific Opportunities at SIRIUS, part II
Thursday September 17: 9 am Seattle, 12 noon NY, 5 pm London, 7 pm Moscow link: https://washington.zoom.us/j/91967881684 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 hard X-rays with […]
ESRF Webinar: Marius Retegan: Computational Spectroscopy in the Age of the Extremely Brilliant Source: From Punch Cards to Artificial Intelligence
Computational Spectroscopy in the Age of the Extremely Brilliant Source: From Punch Cards to Artificial Intelligence Marius Retegan, ESRF scientist Please click the link below to join the webinar: https://esrf.zoom.us/j/92127181949?pwd=bDlpOCtMVDEreDFPSTd0aE14Ymh2Zz09 Passcode: F5i@Cu Webinar ID: 921 2718 1949