Lifetimes of F2+ and Cl2+ in the A2Πu state

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Colleges, School and Institutes


The PIFCO technique,in which mass-selected photoion-fluorescence photon coincidences are counted, is used to determine the lifetime of the A2Πu state of F2+ and Cl2+. Values of 1.4 μs (F2+) and 0.54 μs (Cl2+) are measured, and they are compared with lifetime measurements by other methods. The F2+ result is used to determine the electronic transition moment Re of the A2Πu-X2Πg transition to be 0.51 au, in excellent agreement with ab initio calculations. Oscillator strengths of the A-X transitions of all fluorescing halogen cations are evaluated, and the results discussed.


Original languageEnglish
Pages (from-to)125-132
JournalChemical Physics Letters
Issue number2-3
Publication statusPublished - 1 May 1985