Collisional excitation of metastable O(1D) atoms

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Abstract
The excitation of ground state O(3P) atoms into the metastable O(1D) state by collision with O(3P) atoms occurs predominantly via the lowest 3Πg states of O2. Experimental data on the decay products of the 3Πg Rydberg state are used in a scattering calculation to predict the cross sections and rate coefficients for the excitation and quenching of O(1D) atoms in collision with O(3P) atoms. At 1000 K, the quenching rate coefficient is 6.9×10−12 cm3 s−1. The excitation cross section reaches a maximum of 7.2×10−18 cm2 at a relative energy of 3.8 eV.

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