Resonant optical excitation of the I2 ion-pair states through the RgI2 complexes in the valence states correlating to the 2P1/2Â +Â 2P1/2 limit

Luminescence spectra of I2(β1g,νβ ⩽ 59, D0u+,νD ⩽ 61) ion-pair states are observed in I2 + Rg mixtures after irradiation by Nd:YAG laser. Excitation is attributed to 1064.48 + 532.24 nm pumping of RgI2 complexes in 0g+,1u(2P1/2 + 2P1/2) states. Subsequent decay of the complexes gives free I2(1u,0g+) molecules, which are excited to the ion-pair states by third 532.24 nm photon.