MCHF Studies of Partial Photoionization Cross section of Atomic Fluorine

We will present results of theoretical investigation on the partial and total photoionization cross sections between the $^1D$ and $^1S$ thresholds of atomic fluorine using the multiconfiguration Hartree-Fock method of bound and continuum wave functions. The $2p^4(^1S)ns,md $ series observed by experiment through their decay into the allowed $2p^4(^3P)kl$ and $2p^4(^1D)kl$ ionization channels are carefully identified. The $2s2p^6 \ ^{2}S $ resonance is seen to interact strongly with the nearby $2p^4(^1S)4s \ ^{2}S $ resonance. The results are compared with the available experimental and theoretical data. The energy positions of the resonance series $2p^4(^1S) ns,md $ as well as $2s2p^6 \ ^{2}S$ are found to be in very good agreement with experimental observations.