Emission of singly and doubly charged light fragments from C{sub 60}{sup r+} (r=4-9) in Xe{sup 25+}-C{sub 60} collisions

Journal Article · Sun Dec 01 04:00:00 EST 2002 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.66.063201· OSTI ID:20632450

Martin, S; Chen, L; Bredy, R; Bernard, J; Buchet-Poulizac, M C; Allouche, A; Desesquelles, J ^[1]

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1. Laboratoire de Spectrometrie Ionique et Moleculaire, Universite Lyon 1, UMR CNRS No. 5579, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex (France)

Asymmetrical fission of C{sub 60}{sup r+} (r=4-9) ions are studied in Xe{sup 25+}-C{sub 60} collisions at 100 keV impact energy (v{approx_equal}0.18 a.u.). The branching ratios for the emission of a singly or a doubly charged light fragment, C{sub m}{sup +} or C{sub m}{sup 2+}, are measured for each initial charge state r. The measured m-dependent branching ratios for the singly charged C{sub m}{sup +} fragment emission channels are reproduced using a simple statistical model. The ionization energies I(C{sub 60-2n}{sup q+}) for even numbered fullerenes C{sub 60-2n}{sup q+} (q=1-5, 8; n=1-4) and I(C{sub 2n}{sup +}) for singly charged light fragments C{sub 2n}{sup +} (n=1-4) are estimated by the density-functional theory. The total branching ratio for the C{sub m}{sup 2+} emission channels is found to increase from less than 2 to 25% when the charge r of the parent ion C{sub 60}{sup r+} increases from 5 to 9.

• OSTI ID: 20632450
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 66; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BRANCHING RATIO
CATIONS
CHARGE STATES
DENSITY FUNCTIONAL METHOD
DISSOCIATION
FULLERENES
ION EMISSION
ION-MOLECULE COLLISIONS
IONIZATION
IONIZATION POTENTIAL
KEV RANGE
STATISTICAL MODELS
XENON IONS