Rare gas–iodine complexes in the ion-pair states |
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Authors: | M.E. Akopyan I.Yu. Novikova S.A. Poretsky A.M. Pravilov |
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Affiliation: | V.A. Fock Institute of Physics, St. Petersburg State University, Ul’yanovskaya 1, Staryj Peterhof, 198504, St. Petersburg, Russia |
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Abstract: | Luminescence and luminescence excitation spectra in the vicinity of the optical–optical double resonance transitions to the I2(, vf = 8 and 9, Jf ≈ 55) levels have been measured at the bulb conditions for the I2 + Rg mixtures (Rg = He, Ar, Xe) at the rare gas pressures 2–20 Torr and room temperature. Luminescence attributed to the RgI2 complexes in the ion-pair states has been observed for the first time. It is argued that the complexes can be formed by direct optical excitation from the complexes or colliding pairs. Besides, the RgI2 complexes in the ion-pair states can be formed in nonadiabatic internal conversion processes from the one. The complexes have rather long lifetime, especially in the case of Xe, and decay radiatively and nonradiatively forming I2 molecules in different ion-pair states. |
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Keywords: | Complexes Iodine molecules Ion-pair states Luminescence spectra |
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