Fragmentation of multiply ionized biomolecules induced by MeV heavy ions

29th International Conference on Photonic, Electronic, and Atomic Collisions

Yoshida, S.O.^1 ; Majima, T.^1,2 ; Asai, T.^1 ; Matsubara, M.^1 ; Tsuchida, H.^1,2 ; Itoh, A.^1,2

Department of Nuclear Engineering, Kyoto University, Kyoto

615-8540, Japan^1

Quantum Science and Engineering Center, Kyoto University, Uji

611-0011, Japan^2

关键词: Adenine molecules;    Charge state;    Coincidence measurement;    Ejected electrons;    Fragment ions;    Parent ions;    Single electron capture;    Time of flight;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/3/032062/pdf
DOI  :  10.1088/1742-6596/635/3/032062

来源: IOP

【 摘 要 】

Collision-induced ionization and fragmentation of gas-phase adenine molecules (C5N5H5) have been investigated for single electron capture collisions of 1.2 MeV C2+ions. Coincidence measurements between the number of ejected electrons and the time-of-flight of fragment ions allows us to determine charge states of intermediate parent ions r. Highly charged parent ions are observed up to r ∼ 6 and the production of lighter fragment ions becomes predominant with increasing r. We found that kinetic energies of H+are significantly larger than those of other fragment ions and become nearly equivalent irrespective of r for r > 1.