How to evaluate model4

-The returning electron wave packet spreads according to a transverse velocity imparted to the electron in the initial step.

y= a+ v(transverse)t

v(transverse) = .08 a.u.

-At each return, the excitation probability is given by the product of the excitation cross section for the R times the inverse square of the radius of the returning electron wave packet.

P= n (electrons/area) * sigma for excitation (area)

Where n = 1/y2

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