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High-resolution KLL Auger spectra of multiply ionized oxygen projectiles studied by zero-degree electron spectroscopy

Journal Article · · Phys. Rev. A; (United States)
; ; ; ; ; ; ; ; ; ;
High-resolution measurements of oxygen K Auger electrons have been performed using multiply charged 10-MeV O/sup n//sup +/ (n = 2, 3, and 4) projectiles in collisions with He. Line-broadening effects are strongly reduced so that high-resolution spectroscopy is possible for Auger electrons ejected from fast projectiles. The spectra obtained for O/sup 4+/ and O/sup 3+/ impact show relatively simple structures dominated by lines arising from three-electron (Li-like) and four-electron (Be-like) states, respectively. Using configuration-interaction wave functions, the relativistic energies and fine structures of Li-like states are studied. The relativistic correction, Breit-Pauli operator, and mass-polarization effect are calculated for numerous resonances and metastable autoionizing states in O VI. Excellent agreement with experimental data is obtained. For example, the calculated transition energy of the (1s2s2p)/sup 4/P/sup 0/ state is 416.02 eV. It is to be compared with the corresponding experimental data of 416.0 +- 0.2 eV.
Research Organization:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
OSTI ID:
6056523
Journal Information:
Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 35:10; ISSN PLRAA
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
AUGER EFFECT
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY RANGE
ENERGY SPECTRA
FLUIDS
GASES
HELIUM
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
MEV RANGE
MEV RANGE 01-10
MULTICHARGED IONS
NONMETALS
OXYGEN IONS
RARE GASES
SPECTRA