Rotational propensities in the state selection of NH3+ by pulsed-field ionization

H Dickinson, D Rolland, TP Softley

    Research output: Contribution to journalArticlepeer-review

    28 Citations (Scopus)


    NH+3 ions have been prepared in unique vibration–rotation states v+2, N+, K+, by pulsed–field ionization of high Rydberg states of NH3, populated by two–colour multiphoton excitation. The selected states, ranging from v+3=0 to 7 and N+, K+ ≤ 4 are accessed via the B and C′ states as intermediates. The application of multichannel quantum defect theory to the understanding of the rotational propensities in the mass–analysed threshold ionization spectra is discussed. It is demonstrated that the interactions of the Rydberg pseudo–continuum both with bound Rydberg states and with other continua can be modelled.
    Original languageEnglish
    Pages (from-to)1585-1606
    Number of pages22
    JournalRoyal Society of London. Philosophical Transactions A. Mathematical, Physical and Engineering Sciences
    Publication statusPublished - 1 Aug 1997


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