Wave-packet theory of stopping of bound electrons

A theory is presented for estimating the stopping of bound electrons, whose internal system described in momentum space is considered as a dense interacting electron gas with a Gaussian occupation probability. With the use of an alternative type of random-phase-approximation dielectric function proposed herein, the shellwise stopping powers for protons are calculated in the specific energy range 1--10⁴ keV/amu, where the total stopping powers agree with the data.