Basics of Energy-dispersive X-ray spectroscopy(EDS) & Wavelength-dispersive X-ray spectroscopy (WDS)

Energy-Dispersive X-ray Spectroscopy (EDS) and
Wavelength-Dispersive X-ray Spectroscopy (WDS) are the
Electron probe X-ray microanalysis techniques available for
elemental analysis. They use the characteristic X-rays
generated from a sample bombarded with electrons to
identify the elemental constituents comprising the sample.
Both techniques generate a spectrum in which the peaks
correspond to specific X-ray lines and the elements can be
easily identified. Quantitative data can also be obtained by
comparing peak heights or areas in the unknown with a
standard material. Of the two methods, EDS is more
commonly employed. Data collection and analysis with EDS
is a relatively quick and simple process because the
complete spectrum of energies is acquired simultaneously.
By contrast, with WDS the spectrum is acquired sequentially
as the full wavelength range is scanned. Although, it takes
longer to acquire a full spectrum, the WDS technique has
much improved resolution compared to EDS.

[@1991bhargava]

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[@kavitarajpurohit6909]

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[@gurupadagon6625]

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[@SandeepKumar-jj7zi]

these eds and wds are used in the x ray spectrometers for gold testing?

[@banajadandasena4142]

How the instrument is knowing the proper elemtal present?

[@asthajain4574]

Which source of x ray we use in both the Cases?

[@mangeshkulkarni4357]

We don't use any X-ray source here. We use electron beam of SEM/TEM. This electron beam when fall on sample, the characteristic X-rays are generated which we use for either EDS or WDS Analysis.

[@akshaykumar-bb3bf]

In the video, the professor discussed that there is no X-ray source X-ray released as the electron occupies the nearest electron shell created when the electron displaces it from its position, and the energy is released in the form of an X-ray.