C{sub 60} fragmentation in charge-changing collisions with slow Au{sup +} ions

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053201· OSTI ID:21546783

Nakai, Y ^[1]; Majima, T ^[2]; Mizuno, T; Tsuchida, H; Itoh, A ^[3]

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1. Radioactive Isotope Laboratory, RIKEN Nishina Center, Wako, Saitama 351-0198 (Japan)
2. Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397 (Japan)
3. Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501 (Japan)

We investigated ionization and fragmentation of C{sub 60} in the charge-changing collisions of 2.0 keV/amu Au{sup +} ions with C{sub 60} molecules. We performed simultaneous measurements of product ions, the number of secondary electrons, and a charge-selected outgoing Au projectile. The production of C{sub 60}{sup +} ions was predominant in the single-electron capture (1-capture) process. In contrast, multifragmentation of C{sub 60} was predominant in the single-electron loss (1-loss) process. The multifragmentation was enhanced in the 1-loss process compared with the 1-capture process when the same number of electrons was emitted from C{sub 60}. This enhancement was also observed when a fast Si ion traveled close to a carbon nucleus [T. Majima et al., Phys. Rev. A 74, 033201 (2006)]. The 1-loss process of slow Au{sup +} ions is considered to occur closer to a carbon nucleus than does the 1-capture process. Multifragmentation of C{sub 60} is caused by internal electronic excitation although it is probably assisted by nuclear stopping when, at least, the electronic excitation of C{sub 60} is small.

• OSTI ID: 21546783
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CAPTURE
CARBON
CHARGED PARTICLES
COLLISIONS
ELECTRON CAPTURE
ELECTRON LOSS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
FRAGMENTATION
FULLERENES
GOLD IONS
IONIZATION
IONS
KEV RANGE
LEPTONS
MOLECULES
NONMETALS
SILICON IONS