Hintergrund

Feinstruktur der Röntgenabsorption

1.XAFS ist ein leistungsstarkes Werkzeug zur Untersuchung der lokalen atomaren oder elektronischen Struktur von Materialien.
2.XAFS-Anwendungsfelder: industrielle Katalyse, Nanomaterialien, auch Qualitätsanalyse, Analyse schwerer Elemente usw
3.XAFS-Produktvorteil: Ultrahohe Auflösung (so niedrig wie 0,5 eV), Fluoreszenzmuster (geringer Gehalt an der Basis mit hoher Rückseite), ultrahoher Lichtstrom, extrem niedrige Nachweisgrenzen (so niedrig wie 0,3–0,5 %, 10,1039/ D2CC05081A)

  • Tongda
  • Liaoning, China
  • 1–2 Monate
  • 100 Nuits pro Jahr
  • Information

X-ray Absorption Fine Structure (XAFS), also called X-ray Absorption Spectro scopy (XAS), It is a powerful tool for studying the local atomic or electronic struct ure of materials based on synchrotron radiation light source, and is widely used in hot fields such as catalysis, energy and nano. 

Technical parameter

 

 




Comprehensive performance

Parameter

Instructions

Energy range

5-19keV

Spectral mode

Transmission mode

Luminous flux at sample

1,000,000 photons /s/ev

Energy resolution

XANES:0.5-1.5eV  EXAFS:1.5-10eV

X-ray pathway

Helium access reduces air absorption

Repeatability

Repeated acquisition energy drift <50meV


X-ray source

Power

1.6kW, high voltage 10-40kV, current 1-40mA

Target material

W\Mo target, other targets can be selected

Monochromator

Type

500mm radius of curvature spherical analytical crystal, size 100mm

Detector

Type

Large area SDD, 150mm2 effective area



Other configuration

Sample wheel

18-bit sample wheel, multi-sample continuous automated testing

In situ sample pool

Electrocatalysis, variable temperature, other multi-field, mechanical conditions in situ cell

Analytical crystal

Custom analysis crystal monochromator for special elements



Core advantage:

1.Highest luminous flux products

The photon flux is higher than 1,000,000 photons/SEC /eV, and the spectral acquisition efficiency is several times that of other products; Get the same data quality as synchrotron radiation.

2.Excellent stability

The monochromatic light intensity stability of the light source is better than 0.1%, and the repeated acquisition energy drift is < 50 meV.

3.1% detection limit

High luminous flux, excellent optical path optimization, and excellent light source stability ensure high-quality EXAFS data with measured element content 1%.


Principle of instrument

X-ray absorption fine structure (XAFS) is a powerful tool to study the local atomic or electronic structure of materials, which is widely used in catalysis, energy, nano and other hot fields.

X-ray Absorption Fine Structure

                                                                          The laboratory monochromator XES tests geometric structures

XAFS

                                                                 Mn data, Mn K-edge XAFS data, data consistent with synchrotron radiation source

X-ray Absorption Fine Structure Spectrum

                                                        Emission spectrum data of Fe sample Kβ : core to core XES and valence to core XES



Test data

Foil EXAFS data

X-ray Absorption Fine Structure


Measurable elements: the green part can measure the K side, the yellow part can measure the L side

XAFS


Application fields: industrial catalysis, energy storage materials, nanomaterials, environmental toxicology, also quality analysis, heavy element analysis, etc

X-ray Absorption Fine Structure Spectrum

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