Excitation energy distributions and statistical dissociation of C-70(2+) prepared in collisions with F+ ions at 3 keV

Richard Bredy (1) , C. Ortega (1) , Min Ji (1) , Li Chen (1) , Jerome Bernard (1) , Guillaume Montagne (1) , D. Qian (2) , B. Li (2) , X. Ma (2) , Serge Martin (1)

1 ILM - Institut Lumière Matière [Villeurbanne]
2 Institute of Modern Physics, Chinese Academy of Sciences

The statistical dissociation of C₇₀²⁺ has been studied as a function of the internal energy using collision induced dissociation under energy control (CIDEC). Doubly charged ions C₇₀²⁺ were prepared in F⁺ (3 keV) + C₇₀ → F⁻ + C₇₀²⁺ collisions. Up to seven successive evaporation of C₂ have been observed in a time range of 1.7 μs. The dissociation energies of C_70-2m²⁺ (m=1-7) were determined using a statistical cascade model to reproduce the excitation energy distribution of C₇₀²⁺ parent ions for each dissociation channel. Results are in good agreement with previous theoretical calculations.

Domaines: Chimie; Physique [physics]; Sciences de l'ingénieur [physics]

Richard Bredy, C. Ortega, Min Ji, Li Chen, Jerome Bernard, et al.. Excitation energy distributions and statistical dissociation of C-70(2+) prepared in collisions with F+ ions at 3 keV. Journal of Physics: Conference Series, 2014, 488 (10), pp.102012. ⟨10.1088/1742-6596/488/10/102012⟩. ⟨hal-02313486⟩