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Title: Photoionization of atoms encapsulated in endohedral ions A-C{sub 60}{sup {+-}}{sup z}

Abstract

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}.

Authors:
 [1];  [2]
  1. Department of Physics and Earth Science, University of North Alabama, Florence, Alabama 35632 (United States)
  2. Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303 (United States)
Publication Date:
OSTI Identifier:
20786725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.73.013201; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANIONS; ASYMMETRY; ATOMIC CLUSTERS; ATOMS; CATIONS; CONFINEMENT; CROSS SECTIONS; EXCITATION; EXCITED STATES; FULLERENES; HARTREE-FOCK METHOD; NEON; OSCILLATOR STRENGTHS; PHOTOIONIZATION; PHOTON-ATOM COLLISIONS; PHOTONS; RESONANCE; THRESHOLD ENERGY

Citation Formats

Dolmatov, V. K., and Manson, S. T.. Photoionization of atoms encapsulated in endohedral ions A-C{sub 60}{sup {+-}}{sup z}. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Dolmatov, V. K., & Manson, S. T.. Photoionization of atoms encapsulated in endohedral ions A-C{sub 60}{sup {+-}}{sup z}. United States. doi:10.1103/PHYSREVA.73.0.
Dolmatov, V. K., and Manson, S. T.. Sun . "Photoionization of atoms encapsulated in endohedral ions A-C{sub 60}{sup {+-}}{sup z}". United States. doi:10.1103/PHYSREVA.73.0.
@article{osti_20786725,
title = {Photoionization of atoms encapsulated in endohedral ions A-C{sub 60}{sup {+-}}{sup z}},
author = {Dolmatov, V. K. and Manson, S. T.},
abstractNote = {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}.},
doi = {10.1103/PHYSREVA.73.0},
journal = {Physical Review. A},
number = 1,
volume = 73,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}