Intense-field dissociation dynamics of D2+ molecular ions using ultrafast laser pulses

Tomas Bryan, S.L. Stebbings, R E English, I.C.E. Turcu, John Collier, Jim McCann, Ian Williams

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The dynamics of dissociation of pre-ionized D2+ molecules using intense (10^12–10^15 W cm-2), ultrashort (50 fs), infrared (? = 790 nm) laser pulses are examined. Use of an intensity selective scan technique has allowed the deuterium energy spectrum to be measured over a broad range of intensity. It is found that the dominant emission shifts to lower energies as intensity is increased, in good agreement with corresponding wavepacket simulations. The results are consistent with an interpretation in terms of bond softening, which at high intensity (approximately >3 × 10^14 W cm-2) becomes dominated by dissociative ionization. Angular distribution measurements reveal the presence of slow molecular dissociation, an indication that vibrational trapping mechanisms occur in this molecule.
Original languageEnglish
Article number007
Pages (from-to)2607-2619
Number of pages13
JournalJournal of Physics B: Atomic Molecular and Optical Physics
Issue number13
Publication statusPublished - 14 Jul 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)


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