Rare gas - iodine complexes in the
ion-pair states at room temperature


Akopyan M.E., Lukashov S.S., Poretsky S.A.,
Pravilov A.M. (pravilov@photonics.phys.spbu.ru)

V.A.Fock Institute of Physics, St.Petersburg State University, Ul’yanovskaya 1,
Staryj Peterhof, 198504, St.Petersburg, Russia



Two years ago, we describe the first spectroscopic evidence of formation of the RgI2(IP) complexes at I2 + Rg mixtures (Rg = He, Ar, Xe, IP are states of the iodine ion-pair second tier) by means of the OODR technique in the vicinity of the I2(f0+g,vf=8 and 9) levels under the bulb conditions at rare gas pressures 2 – 20 Torr and room temperature. In the beginning of 2007, Ridley et al. offer an alternative explanation for the experimental data observed in our work. To their opinion, all the data of our work can be explained in framework of collisional energy transfer in the intermediate I2(B) and final I2(f) states. In this paper, we present thorough analysis of experimental data given in our and Ridley’s et al. papers. We have shown that neither excitation nor luminescence spectra recorded in these Refs. cannot be explain in the framework of collision-induced transitions in intermediate B or final f states of a free iodine molecules, and the spectroscopic features can be explain by direct optical population of the RgI2(IP) complexes, as it has been done in our work.