Communication: Delayed asymmetric Coulomb fission of molecular clusters: Application of a dielectric liquid-drop model.

Research output: Contribution to journalArticle


Delayed asymmetric Coulomb fission in size-selected molecular dication clusters has been recorded for the first time. Observations on (NH(3))(n) (2+) clusters show that fragmentation accompanied by charge separation can occur on a microsecond time scale, exhibits considerable asymmetry, and involves a kinetic energy release of ∼0.9 eV. The fission process has been modeled by representing the fragments as charged dielectric spheres and the calculated maximum in the electrostatic interaction energy between the fragments gives a good account of the measured kinetic energy release. A simple kinetic model shows that instrumental factors may contribute to the observation of asymmetric fragmentation.


  • Guohua Wu
  • Xiaojing Chen
  • Anthony J Stace
  • Per Linse
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Chemistry
Original languageEnglish
Article number031103
JournalJournal of Chemical Physics
Issue number3
Publication statusPublished - 2011
Publication categoryResearch