Cascade decays of hollow ions

Journal Article · Wed May 01 04:00:00 EDT 1991 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.43.4695· OSTI ID:5539932

Omar, G ^[1]; Hahn, Y ^[2]

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1. Department of Physics, Ain Shams University, Abbassia, Cairo, Egypt (EG)
2. Department of Physics, University of Connecticut, Storrs, Connecticut 06269 (USA)

A multiple-electron-emission process for atoms with one or more inner-shell vacancies is treated using the radiative- and Auger-electron-emission cascade model, in which inner-shell holes are assumed to decay by sequentially emitting radiations and/or Auger electrons. Such hollow ions are produced by synchrotron irradiation of atomic targets and in ion-surface interactions with multiple-electron transfers. The final charge-state distribution is determined by the Auger and radiative branching ratios at each stage of the decay sequence. At intermediate stages of cascade, hollow ions with more than one hole in different ionization stages are created. The Ne, Mg, and Fe{sup 14+} ions with the initial 1{ital s}, 2{ital s}, and 2{ital p} vacancies are considered in detail, and the core charge dependence of the maximum charge state is studied. The hollow Mg ion with double initial 1{ital s} holes is analyzed, and the result compared with that for the case of one 1{ital s} hole. The peak is shifted more than two units to a higher degree of ionization. The correlated shake-off and shake-up multiple-electron processes are not considered, but they are expected to cause further shifts.

• OSTI ID: 5539932
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 43:9; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
AUGER EFFECT
BREMSSTRAHLUNG
COLLISIONS
DATA ANALYSIS
ELECTROMAGNETIC RADIATION
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GASES
INNER-SHELL IONIZATION
IONIZATION
IRON
MAGNESIUM
METALS
NEON
NONMETALS
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
RADIATIONS
RARE GASES
SYNCHROTRON RADIATION
TRANSITION ELEMENTS