Potentials for weakly bound states in I2 from diffuse spectra and predissociation data

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Abstract
Potential curves are derived for the 2431 1Πu and 2341 a(1g 3Π) states of I2 using existing data from several sources. Compared with previous estimates, the new potentials are thought to be valid over a wider range of internuclear distance, spanning the shallow bound wells at large R (>4Å) and the repulsive regions where they cross the well‐known B(O+u 3Π) state at small R (B state. The role of these states in the collisional quenching of B and in the geminate recombination of I atoms is considered.