Locate full-text(opens in a new window)|View at Publisher| Export | Download | Add to List | More... Chemical Physics Letters Volume 662, 1 October 2016, Pages 250-256 The HeI2(ion-pair states) van der Waals complexes

Abstract

The T-shaped HeI2(E0g +) van der Waals complexes populated in the HeI2(E,vE = 0–2,nE = 0 ← B,19,nB = 0 ← X,0,nX) excitation pathway have been studied. Analysis of the luminescence excitation spectra as well as the I2(E0g + → B0u +, D0u + → X0g +, and D′2g → A′2u) luminescence spectra themselves has been carried out. It has been shown that the I2(D → X, and D′ → A′) luminescence is due to HeI2(E ← B) transitions with subsequent electronic predissociation. We have determined dissociation energies of the HeI2(E,vE = 0–2) complexes, vibrational populations of the E, D states and branching ratios of vibrational and electronic predissociations. One can suppose that luminescence of the HeI2(E,vE = 0,nE = 0) complexes occurs. © 2016 Elsevier B.V.