XAFS Journal Club
Adam Hitchcock: Soft X-ray Spectromicroscopy in Scanning Transmission X-ray Microscopes
Soft X-ray scanning transmission microscopy (STXM) is a powerful tool for nanoscale materials analysis, with significant advantages over analytical electron microscopies for studies of radiation sensitive materials. Chemical species identified […]
Kelsey Morgan: Hot science with cool sensors
The transition-edge sensor (TES) microcalorimeter uses the sharply temperature-dependent resistance of the superconducting transition to measure the energy of X-ray and gamma ray photons. A single TES is a broadband, […]
Martin McBriarty: Top-Down Approaches to EXAFS Analysis
EXAFS spectra are often modeled using a small number of virtual coordination shells which can vary in coordination number, bond length, and disorder. While this bottom-up approach is generally successful […]
Steve Heald: Sector 25 at the APS-U: Two new beamlines for advanced spectroscopy
As part of the Advanced Photon Source (APS) Multibend Achromat lattice upgrade two new beamlines for spectroscopy will be constructed on a canted undulator source at Sector 25. The programs […]
Neil Hyatt: Multimodal microfocus XAS to understand and remediate DU munitions contamination
The talk will show how multimodal microfocus X-ray spectroscopy has been applied to characterize depleted uranium particles from munitions testing to predict and understand their environmental behavior. A combination of […]
Jacinto Sa: Solving chemical mechanisms with X-ray spectroscopy
As a scientist have been always fascinated with how chemical systems react and interact with the natural world. Spectroscopy is a great tool to look at systems in real-time and […]
Yulia Pushkar: X-ray Emission Spectroscopy at X-ray Free Electron Lasers: Limits to Observation of Unperturbed Electronic Structures
Modern free electron lasers provide intense X-ray pulses with 10^12 photons within ~10-100 femtoseconds. Such pulses enable new experimental techniques and provide unique opportunities for investigation of electronic and nuclear […]
Rene Bes: Nuclear fuel study using XAS: benefits of HERFD for U valence states evaluation
The safe use and disposal of UO2 based nuclear fuels relies on the stability of their material properties, under extreme conditions of temperature and irradiation, and with constantly evolving chemical […]
Joe Fowler: X-ray Fluorescence Line Metrology for the 21st Century
Databases of x-ray fluorescence line energies such as those of Deslattes (2003) and Bearden (1967) are critical to the calibration of any analytical tools that identify elemental compositions by their […]
Eleanor Schofield: X-ray Absorption Spectroscopy in the service of Henry VIII: Conserving a Tudor shipwreck
The conservation of marine archaeological wood is complicated by the presence of iron and sulfur. The sulfur originates from sulfate ions in seawater being transformed by sulfur reducing bacteria, and […]
Frank deGroot: Transition metal K edge spectral shapes: The influence of core hole screening
Using High-Energy-Resolution-Fluorescence-Detection (HERFD), one can sharpen the pre-edge structures revealing their multiplet nature. In ionic systems, they can be calculated from the transition from the 3dN ground state to the […]
Faisal Alamgir: Soft and Hard X-ray Operando and In/Ex-situ XAFS: Towards a Unified View of Local Structure and Magnetic Properties in LiMO2 Delafossite Batteries
We will look at how electrochemically active materials such as batteries can be studied in a concerted way by tuning to relevant resonant x-ray absorption at both the soft and […]