Khalil Hassebi

Nicolas Rividi

Anne Verlaguet

Alexei Erko

Juergen Probst

Heike Loechel

Thomas Krist

Karine Le Guen

Philippe Jonnard

Reflection Zone Plate Spectrometer For Li K Emission Detection In Lithium Compounds

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Methods:

Motivation:

Results:

Conclusion:

References:

3 Li X SQ 1. Excitation: The sample is being bombarded with and acccelerated beam of charged particles (electrons).

Ionization:

The interaction of the beam of electrons with matter leads to the ionization of the core states.

3. Emission: the vacancy is filled with an electron from an outer shell, resulting in the emission of an x-ray photon that correspond to the energy difference between the two states.

We demonstrate the possibility to spectroscopically analyze Li K emissions in different compounds using a non destructive and accessible technique. We also report for the first time the Li K emission bands in minerals. Our results unlocked potential for various applications to study in details the fine structure of valence band of lithium. ----------------------------------E Grating Law:

Electron Binding Energy

d(cos(α) -cos(β))= n Y e s !
Can we detect lithium and study its electronic structure in complex materials? How?

• Probing the fine electronic structure of the valence band using soft x-ray emission spectroscopy technique (SXES) integrated in EPMA • Tracking the changes in the chemical environment and emission spectrum (Intensity, shape, shift, band width...)

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You want to keep in touch!

Scan the QR code or contact me at: khalil.hassebi@sorbonne-universiter.fr [1] A. Erko et al., Opt. Express, vol. 22, no. 14, p. 16897, Jul. 2014, doi: 10.1364/OE.22.016897.

[2] K. Hassebi et al., X-Ray Spectrometry, doi: 10.1002/xrs.3329

The Li K emission occurs when a 2p valence states transition to 1s core states in lithium atoms and therefore the spectrum reflects the distribution of the p states within the valence band

Li K emission reported for the first time in minerals

Figure 2 :

 2 Figure 2: Wavelength dispersive spectroscopy (WDS) technique implemented inside the EPMA to acquire emission spectra

Figure 3 :

 3 Figure 3: Image of reflection zone plate spectrometer mounted on a eletron probe microanalyser (Cameca SX100).

•Figure 4 :Figure 1 :

 41 Figure 4: The Li K emission in LiF sample, presenting the emission band of Li metal and Li in oxide

  [2]. The Li K emission of lithium in LiF, Lepidolite K(Li,Al) 3 (Si, Al) 4 O 10 (OH) 2 , Bikitaite LiAlSi 2 O 6 (OH) 2 , and Amblygonite (Li,Na)Al PO (F,OH) is presented below.Incident angle αUnlock new frontier by allowing the quantification of lithium in complex materials such as lithium bearing minerals and materials used for lithium batteries with a technique that is both accessible and cost-effective.

Figure 5 :Figure 6 :

 56 Figure 5: The x-ray emission spectra of Lepidolite and Amblygonite in the full range of the spectrometer