Significant Redistribution of Ce 4d Oscillator Strength Observed in Photoionization of Endohedral Ce-C{sub 82}{sup +} Ions

Journal Article · Fri Sep 26 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.133001· OSTI ID:21179753

Mueller, A; Schippers, S ^[1]; Habibi, M; Esteves, D; Wang, J C; Phaneuf, R A ^[2]; Kilcoyne, A L. D.; Aguilar, A ^[3]; Dunsch, L ^[4]

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1. Institut fuer Atom- und Molekuelphysik, Justus-Liebig-Universitaet, 35392 Giessen (Germany)
2. Department of Physics, MS 220, University of Nevada, Reno, Nevada 89557-0058 (United States)
3. Advanced Light Source, Lawrence Berkeley National Laboratory, MS 7-100, Berkeley, California 94720 (United States)
4. Leibniz-Institut fuer Festkoerper- und Werkstoffforschung Dresden, D-01171 Dresden (Germany)

Mass-selected beams of atomic Ce{sup q+} ions (q=2, 3, 4), of C{sub 82}{sup +} and of endohedral Ce-C{sub 82}{sup +} ions were employed to study photoionization of free and encaged cerium atoms. The Ce 4d inner-shell contributions to single and double ionization of the endohedral Ce-C{sub 82}{sup +} fullerene have been extracted from the data and compared with expectations based on theory and the experiments with atomic Ce ions. Dramatic reduction and redistribution of the ionization contributions to 4d photoabsorption is observed. More than half of the Ce 4d oscillator strength appears to be diverted to the additional decay channels opened by the fullerene cage surrounding the Ce atom.

• OSTI ID: 21179753
• Journal Information: Physical Review Letters, Vol. 101, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.101.133001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CERIUM
CERIUM IONS
FULLERENES
OSCILLATOR STRENGTHS
PHOTOIONIZATION