Datensatz

Zusammenfassung

In interstellar media dissociative recombination is considered the principal destruction mechanism for molecular ions. Information about this process is very important in astrophysical modeling and therefore essential for radioastronomical probes. A molecular fragmentation study on the dissociative recombination of deuterated formyl cations has been performed applying the merged-beam technique provided by the heavy-ion storage-ring TSR at the Max-Planck-Institute for Nuclear Physics in Heidelberg. Utilizing a recently developed energy-sensitive imaging detector advanced investigations of the energy dependent evolution of the branching ratios into the di erent accessible fragmentation channels and the inner excitation of the molecular recombination products have been enabled. The interpretation of the data resorts to an independently performed relaxation study which yielded the inner excitation of the initial molecular ions and the abundance ratio of the isomer. The experimental results indicate correspondence to calculations on the molecular system, which determined electronic resonant states through which the dissociative recombination is considered to proceed.