The HeI2 van der Waals complexes in a “free-rotor” configuration

Research output


The HeI2(E ${0}_{g}^{+},$ v E = 0–6, n E > 0) van der Waals complexes in a free-rotor configuration populated in the excitation pathway via HeI2(B ${0}_{u}^{+},$ v B = 19, n B = 2–4) intermediate levels have been studied utilizing laser-induced luminescence spectroscopy methods. Analysis of the excitation pathway has been performed, and the I2($E{0}_{g}^{+}$ → $B{0}_{u}^{+},$ and $D{0}_{u}^{+}$ → X ${0}_{g}^{+}$) luminescence spectra have been measured. These I2(E and D) molecules are the product of the HeI2(E, v E = 0–6, n E ) vibrational and electronic predissociation, respectively. We have defined the probabilities of the HeI2(E, v E = 0–6, n E ) predissociation channels, vibrational populations of the I2(E and D) states as well as binding energies of the HeI2(E, v E = 0–6, n E , J = 0) states. A modified ab initio potential of the HeI2(E) state has been used to explain experimental results.
Original languageEnglish
Pages (from-to)035101
Number of pages8
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number3
Early online date6 Jan 2020
Publication statusPublished - 14 Feb 2020


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