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Correlation effects on double electron capture in highly-charged, low-energy ion-atom collisions

Conference ·
OSTI ID:6016041
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The method of zero-degree Auger electron spectroscopy has been used to study two-electron excited states populated in slow double capture collisions of highly charged ions with He and H/sub 2/. The focus of this study is on production of autoionization electrons originating from the non-equivalent 1s/sup 2/2pnl electron configurations in comparison with electron production resulting from the Auger decay of (near) equivalent 1s/sup 2/nln'l' (with napprox.n') configurations. It is shown that production of non-equivalent electron configurations is significant and involves electron-electron correlation effects whose analysis leads beyond the independent-particle model. Recent results that include a measurement at non-zero angles are presented to illustrate the angular dependence of electron emission from non-equivalent electron configurations, as well as the dependence on projectile charge state and target species. Comparison of high resolution scans over two lines of the 1s/sup 2/2pnl sequence for the O/sup 6 +/ + He system with accurate transition energy calculations shows preferential population of high angular momentum substation.

Research Organization:
Oak Ridge National Lab., TN (USA); Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F.R.)
DOE Contract Number:
AC05-84OR21400
OSTI ID:
6016041
Report Number(s):
CONF-870715-4; ON: DE87013179
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 ELECTRON SPECTROSCOPY
AUTOIONIZATION
CAPTURE
CHARGED PARTICLES
COLLISIONS
CORRELATED-PARTICLE MODELS
CORRELATIONS
CROSS SECTIONS
ELECTRON CAPTURE
ELECTRON CORRELATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
HELIUM
HYDROGEN
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
IONS
MATHEMATICAL MODELS
MOLECULE COLLISIONS
MULTICHARGED IONS
NONMETALS
PARTICLE MODELS
RARE GASES
SPECTROSCOPY