Photoionization of atoms encapsulated in endohedral ions A-C{sub 60}{sup {+-}}{sup z}
- Department of Physics and Earth Science, University of North Alabama, Florence, Alabama 35632 (United States)
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303 (United States)
Results of a theoretical study of photoionization cross sections and photoelectron angular asymmetry parameters of atoms confined by positively C{sub 60}{sup +z} or negatively C{sub 60}{sup -z} charged fullerene shells are presented. For negatively charged C{sub 60}, entirely new confinement resonances, termed Coulomb confinement resonances, that dominate the spectra of the encapsulated atoms are predicted. In addition, the effect of a negative C{sub 60} shell is to move some of the oscillator strength of the encapsulated atom from the discrete excitation region into the continuum. For positively charged C{sub 60}, the situation is much different; no Coulomb confinement resonances occur in the photoionization spectrum of the encapsulated atom, and charging the shell positively does nothing to the photoionization cross section (as a function of photon energy) except to increase the threshold energy. The findings result from model Hartree-Fock calculations of 1s photoionization of Ne confined by neutral, negative, and positive C{sub 60}.
- OSTI ID:
- 20786725
- Journal Information:
- Physical Review. A, Vol. 73, Issue 1; Other Information: DOI: 10.1103/PhysRevA.73.013201; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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