Straggling of Heavy Charged Particles: Comparison of Born Hydrogenic-Wave-Function Approximation with Free-Electron Approximation

Statistical fluctuations in the energy loss of heavy charged particles in this absorbers resulting from collisions with atomic electrons are determined for collision cross sections obtained from the first Born approximation calculated with hydrogenic wave functions. A comparison is given with the results calculated with a $\frac{1}{{\epsilon }^2}$ collision spectrum.