Subexcitation electrons average energy

It is convenient to present the energy spectrum of subexcitation electrons in dimensionless units as a function hwm rj(E) of the variable Elhwater vapor each dot represents the average value for a small energy interval. One can note that the spectra... 

Platzman s [49] analysis for the W value may given as IF = ( ion) + Vex( ex) + E, where (iiion), ( ex), and E are the average energies for ionization, excitation, and subexcitation electrons, respectively, and Vgx is the relative number of excitations to ionizations. It provides a basis for understanding the insensitivity of IF on particle energy, because the quantities involved depend not so much on absolute cross-sections for ionization and nonionizing energy loss, as it depends on their ratio. 

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