2002/08/23 by B. Siegmann, U. Werner, H. O. Lutz +1 · 1 citation
Physics and Astronomy · Chemistry · #Advanced Chemical Physics Studies #Atomic and Molecular Physics #Mass Spectrometry Techniques and Applications
paper · doi:10.1088/0953-4075/35/17/311
openalex publication_date 2002/08/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We studied the ionization and fragmentation of CO 2 in collisions with 5.9 MeV u −1 Xe 18+ and Xe 43+ ions utilizing a position-and time-sensitive multi-particle detector. By coincident measurement of the momenta of correlated fragment ions the applied method yields a kinematically complete description of the fragmentation process. Of special interest are the 'Coulomb explosion' (CE) processes CO 2 − → C p + + O q + + O r + for which the released kinetic energy as well as angular correlations are determined. The measured angular spectra are—provided that the molecular vibrations of CO 2 are taken into account—in reasonable agreement with a simple CE model. This model is, however, insufficient to explain the observed energy distributions. Apparently the detailed electronic structure of the intermediate highly charged CO 2 ion plays an important role.