on PLASMA ....In molecules, regions of electron density are usually found around the atom, and its bonds. In de-localized or conjugated systems, such as phenol, benzene and compounds such as hemoglobin and chlorophyll, the electron density covers an entire region, i.e., in benzene they are found above and below the planar ring. This is sometimes shown diagrammatically as a series of alternating single and double bonds. In the case of phenol and benzene, a circle inside a hexagon shows the de-localized nature of the compound...Electron density is the measure of the probability of an electron being present at a specific location,ALSO,look pdf about n e
I think Mohammed Ubaid Hussein mixed up two different things here - the electron density in a plasma, which is the number of electrons per unit volume (and the entity, Muhammad Usman Khan wants to measure) and the electron probability function, which is indeed the quantum mechanical propability to find an electron with velocity v in a certain place at a certain time.
@Muhammad Usman Khan: If you want to measure the electron density with LIBS you will have first to make sure that your spectrometer is calibrated for wavelength and absolute intensity of your emission line. If this is the case, you can determine ne, for example, follow the procedure outlined in this paper: