Have you seen this work https://hal.science/hal-04056104v1/file/iumas.pdf (https://hal.science/hal-04056104v1/file/iumas.pdf) and https://hal.sorbonne-universite.fr/hal-04056076v1 (https://hal.sorbonne-universite.fr/hal-04056076v1)
Lithium on a SX100 using a Reflection Zone Plate Spectrometer
Reflection Zone Plate Spectrometer For Li K Emission Detection In Lithium Compounds
Khalil Hassebi (1) , Nicolas Rividi (2) , Anne Verlaguet (3) , Alexei Erko (4) , Juergen Probst (5) , Heike Loechel (5) , Thomas Krist (5) , Karine Le Guen (1) , Philippe Jonnard (1)