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Research in a variety of fields uses the chemical state analysis method known as X-ray absorption spectroscopy (XAS). By measuring the transmission (or fluorescence) of x-rays as a function of increasing x-ray energy incrementally in small steps at energies near to the absorption edge, this method can be used to study biological tissues.
The energy needed to eject an electron from an electron shell) of an element of interest (such as Fe) is the same as the absorption edge energy. The status of the electrons can be inferred from subtle alterations in the way x-rays are absorbed close to an atom’s absorption edge.
There are two regions in X-ray Absorption Spectroscopy (XAS):Sharp resonance peaks can be seen in the region of the x-ray spectrum closest to the absorption edge (about 100 eV about the edge), which is known as the X-ray absorption near edge structure (XANES/NEXAFS).
In general, the area is sensitive to local atomic states like symmetry and oxidation states.Extended fine structure (EXAFS): Features in this region can be found up to 1000 eV or more beyond the absorption edge, emerging after the XANES region.
EXAFS is characterized by mild oscillations in the recorded signal and is brought on by the scattering of the expelled electron by the atoms in the immediate vicinity. The information about nearby atoms that can be measured via EXAFS includes bond lengths and chemical coordination environments.
The Global X-ray Absorption Spectroscopy (XAS) market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
Standard experimental station for effective X-ray Absorption Spectroscopy (XAS): Hutch BFor effective X-ray Absorption Spectroscopy (XAS) on samples put into conventional sample holders, the first experimental hutch is designed.
This hutch houses a non-customizable optical table with enough equipment to reduce beamline downtime. On samples tested in a cryostat (at 10 K) or a chamber with a constant temperature of room air, we support transmission and fluorescence.
Additionally, if the cell fits inside the room temperature chamber’s space envelope, the X-Y stages operating at room temperature can handle small user-supplied cells (such as those used for in-situ catalysis).
Similar to that, ANSTO also supports capillary heating to 1000K in Hutch B on the X-Y stage and in-situ battery study. Please get in touch with the beamline team to go over particular requirements.
