Fragmentation of size-selected Xe clusters: Why does the monomer ion channel dominate the Xe-n and Kr-n ionization - Archive ouverte HAL
Article Dans Une Revue International Journal of Mass Spectrometry Année : 2009

Fragmentation of size-selected Xe clusters: Why does the monomer ion channel dominate the Xe-n and Kr-n ionization

Viktoriya Poterya
  • Fonction : Auteur
Michal Farnik
  • Fonction : Auteur
Udo Buck
  • Fonction : Auteur
David Bonhommeau
Nadine Halberstadt

Résumé

The fragmentation of the small Xe-n n = 2 - 5 clusters following 70eV electron impact ionization has been investigated in a size selective experiment and simulated using non-adiabatic dynamics. The experimental results show that the clusters strongly fragment to yield monomer Xe+ (more than 90%) and climer Xe-2(+) fragments (the remaining few percent). Trimer Xe-3(+) fragments first occur from the neutral pentamers Xe-5 in a very low yield of approximately 0.3%. The present results are compared with the previous ones for Kr and At clusters. It is shown that the Xe and Kr Clusters exhibit a qualitatively similar behavior with a strong propensity for monomer fragments, while in the At case dimers prevail. The theoretical calculations also reveal a strong fragmentation to the dimer and monomer fragments. However, the dimer Rg(2)(+) is predicted to be the major product for all rare gases (Rg Ar, Kr, Xe). Possible reasons for the discrepancy between theory and experiment are discussed

Dates et versions

hal-00932435 , version 1 (17-01-2014)

Identifiants

Citer

Viktoriya Poterya, Michal Farnik, Udo Buck, David Bonhommeau, Nadine Halberstadt. Fragmentation of size-selected Xe clusters: Why does the monomer ion channel dominate the Xe-n and Kr-n ionization. International Journal of Mass Spectrometry, 2009, 280 (1-3), pp.78-84. ⟨10.1016/j.ijms.2008.07.024⟩. ⟨hal-00932435⟩
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