Dissociation of doubly charged clusters of lithium acetate: Asymmetric fission and breakdown of the liquid drop model

Abstract

Doubly charged clusters of lithium acetate above the critical limit dissociate via symmetrical fission processes and not neutral evaporation. These results are clearly in disagreement with the Rayleigh liquid drop model that has been used previously to predict the critical size and explain the fragmentation behavior of multiply charged clusters. Copyright © 2016 John Wiley & Sons, Ltd.

Electron-induced dissociation dynamics studied using covariance-map imaging

“…The existence of such ions is oen revealed in time-of-ight (ToF) measurements by long "tails" on the corresponding ion ToF peaks, caused by the ions dissociating as they traverse the eld-free ight tube aer clearing the extraction region of the mass spectrometer. [35][36][37] A number of techniques have been used to study the unimolecular decay of multiply-charged ions, including tandem mass spectrometry, [38][39][40][41][42] photoelectronphotoion-photoion coincidence (PEPIPICO) [43][44][45][46][47] and covariance-map imaging. 31,36,[48][49][50][51] Covariance analysis of multimass velocity-map imaging datasets is a powerful technique which allows correlations between ions formed from the same individual molecule or cluster to be observed.…”

“…A number of techniques have been used to study the unimolecular decay of multiply-charged ions, including tandem mass spectrometry, 38–42 photoelectron–photoion–photoion coincidence (PEPIPICO) 43–47 and covariance-map imaging. 31,36,48–51 Covariance analysis of multimass velocity-map imaging datasets is a powerful technique which allows correlations between ions formed from the same individual molecule or cluster to be observed.…”

Coulomb Explosion of Multi-charged Atomic Alkaline Metal Clusters

“…The study of the interaction of nanometric systems with intense electromagnetic fields through the application of sources of high power laser beams (10 15 –10 20 W/cm 2 ), generated in the form of short pulses in periods of femtosecond, has allowed to investigate fundamental electronic properties of clusters, such as ionization potentials and fragmentation energies. − A wealth of research is devoted to identify the mechanisms of multiple ionization of a cluster in a strong electromagnetic field and its subsequent explosion in several fragments. − …”