Two-photon absorption spectroscopy of iodine monochloride in the 5 eV region |
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Authors: | GW King IM Littlewood RG McFadden JR Robins |
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Institution: | Department of Chemistry, McMaster University, Hamilton, Ontario, Canada L8S 4M1 |
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Abstract: | Two-photon high resolution sequential spectroscopy has been used to excite iodine monochloride from X1Σ+ ground state to the intermediate A3Π1 state and thence to a final electronic state at 4.82 eV. Vibrational and rotational analyses of this state have been carried out for both isotopic species. For I35Cl, Te = 38916.0 cm?1 ωe = 168.99 cm?1, ωexe = 0.357 cm?1 and Be = 0.05685 cm?1. The state probably has Ω = 1 in case (c) coupling approximation. It is also shown how to two-photon technique enables rotational line structure of the A ← X transition to be selectively excited for either isotopic species at a resolution of 500000, from an absorption mixture containing natural iodine monochloride plus its iodine dissociation product at equilibrium vapour pressure. |
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