Electronic stopping power: also Coulomb interactions, but inelastic Non-local: ion experiences drag due to"free" "or polarizable electrons incident ion attracts electron polarization lon velocity=> charge separation, drag E Local: passing ion causes internal electronic transitions =>energy and moment transfer Because electrons can follow fields up to optical frequencies, (velocities of 105 m/s- 100 times faster than pho onions electronic losses dominate at higher ion velocities S(E)=cion -kE 2 3.155J/6.152J.2003Electronic stopping power: also Coulomb interactions , but inelastic) Non-local: ion experiences drag due to “free” or polarizable electrons: incident ion attracts electron polarization, Local: => energy and moment transfer E e - e - e - Ion velocity=> charge separation, drag passing ion causes internal electronic transitions Because electrons can follow fields up to optical frequencies, (velocities of 105 m/s - 100 times faster than phonons) S ( E) = cv e ion electronic losses dominate at higher ion velocities. 3.155J/6.152J, 2003 11 = kE 1 2