ENERGY DISSIPATION BY IONS IN THE kev REGION

摘要: At low energies ionic collisions with atoms are largely elastic. Simple theoretical approximations to scattering cross sections, ranges and straggling derived for power potentials, showing that the is peaked in forward direction rather than isotropic. Using an approximate universal potential of Thomas-Fermi type a natural measure range, $\ensuremath{\rho}$, energy, $\ensuremath{\epsilon}$, obtained all ions substances. The corresponding range-energy curve computed.At higher ion electronic excitation becomes increasingly important. An formula given stopping contribution, increasing proportional velocity at moderate velocities. These results applied interpretation few isotope effects, observed range measurements.