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Edwin E. Quashie edited Fig_ref_fig_energy_distance_shows__.tex
almost 8 years ago
Commit id: 23015d4ed4ffe57547d9de3a493ed2891355a295
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Fig. \ref{fig:energy_distance} shows the total electronic energy of the
$\mathrm{H^+ + Cu}$ system as a function of position
at for various projectile velocities for the hyper-channeling case. At lower velocities regime, the energy transfer is rather small which
support supports the adiabatic behavior.
But at higher velocities aside oscillations of the total energy with the position of the projectile, the total energy of the system increases with time.
After the projectile travels some short distance in the crystals ($\sim 5~a_0$) the increase in total energy of the system stabilizes at a steady rate.
At that stationary state, the $S_\text{e}$ is then extracted from the average slope of the total energy vs. projectile displacement; these
represents represent the energy gained by the target or the energy loss of the projectile.
Hence a stationary regime is reached and the difference in energy ($\Delta E$) remains constant for
the corresponding lattice positions of the projectile.