Ground state Fe atom formation efficiencies from two-photon dissociation of Fe(CO)5 at 386.0, 368.0, 319.3 and 298.4 nm

Relative formation efficiencies of the ground state Fe atoms from two-photon dissociation of Fe(CO)5 have been studied using an unfocused weak laser pulse at 386.0, 368.0, 319.3 and 298.4 nm. The laser wavelengths correspond to a5D4 → z5D4, a5D4 → z5F4, a5D4 → z3F4 and a5D4 → y5D3 transition frequencies of an Fe atom. The relative amounts of Fe atoms generated by two-photon dissociation of Fe(CO)5 were obtained by comparing the emission intensities from the excited state of Fe atoms with and without a pulsed dc discharge. The relative formation efficiencies are 100:21:0.2:0.08 as the photon energy decreased.