Abel Inversion in Ion Imaging: Approximation and Its Revision

We present a new iterative method for the analysis of data obtained by imaging techniques. This method is based on a detailed investigation for the motion of charged particles in ion imaging apparatus. The conventional inversion approach is a good approximation only in the case of small kinetic energies of the charged particles. The iterative method has been employed to study the photoelectron spectrum of iodine atoms via intermediate state 3P0 by using 278.5nm laser. We got a relative energy resolution of 3.9% and found the photoionization involves two different passways corresponding to 3P0→3P0 and 3P0→3P1 respectively.