Efficient long-range collisional energy transfer between the E0g+(3P2) and D0u+(3P2) ion-pair states of I2, induced by H2O, observed using high-resolution Fourier transforn emission spectroscopy

Trevor Ridley, Kenneth Lawley, Robert Donovan, Amanda Ross

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Abstract

Using high-resolution Fourier transform emission techniques, we have resolved rotational structure in the D0u+(3P2) → X0g+ emission following collisional transfer from the E0g+(3P2) state in I2. The P:R branch ratios in the E0g+(3P2) → D0u+(3P2) transfer are found to vary enormously with vE and vD. We show that the observed intensities are all consistent with the transfer being dominated by long-range, near-resonant collisions with residual H2O. Unequal P:R branch ratios in the E0g+(3P2) → A1u emission have been shown to result from mixing of the E0g+(3P2) and β1g(3P2) states via Ω-uncoupling.
Original languageEnglish
Article number114302
Number of pages8
JournalThe Journal of Chemical Physics
Volume135
Issue number11
DOIs
Publication statusPublished - Oct 2011

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