Research on Quantum Dynamics in Matter
We study the atomic collisions of charged
or neutral ions in multielectronic targets, and the individual and collective processes
involved to compare with the experimental data for ionization cross sections, or
stopping and straggling cross sections in gases and solids of interest.
This research include the calculation of
probabilities of single and multiple ionization, ionization cross sections in
one or in both centers (projectile and target), stopping power per unit path
length, and energy loss straggling.
Nowadays we are employing a many-electron
model named shellwise local plasma approximation. The multielectronic targets
studied are gases such as Ne, Ar, Kr, and Xe, or solids such as Al, Cu, Fe y
Zn, or even actually heavy atoms as Au, W, or Pb with about 80 bound electrons,
including the 4f subshell with its 14
electrons. This latest group of atoms requires the employment of relativistic
wave functions and binding energies.