Li has a low xray yield becasue it is a very light element. Light elements emit most of the time an auger electron instead of a photon.
Seccondary especially old detectors employ a Be window, which absorbs most energy emmited by lighter elements.
For reference please have a look in this book:
[1] J. Goldstein, C. Lyman, D. Newbury, E. Lifshin, P. Echlin, L. Sawyer, D. Joy, and J. Micheal, Scanning Electron Microscopy and Microanalysis. Boston, MA: Springer US, 2003.
some one was said me to the characterization of SOFT X-RAY EMISSION SPECTROSCOPY analyzation has to be find out the lithium component. i don't know about where it is available, if u able to help me.
Is an EDX analysis of lithium nitrate possible? I have not been able to identify lithium nitrate. Are there any possible explanations for this? If possible, also cite literature sources.