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Title: Electron-impact ionization of Se/sup 24+/

Cross sections for electron-impact ionization of neonlike selenium have been calculated using close-coupling wave functions. We report cross sections for ionization of the 2s/sup 2/2p/sup 6/ /sup 1/S ground state and the 2s/sup 2/2p/sup 5/3s /sup 3/P excited state of the ion. We found numerous resonances in the ejected electron channels due to excitation of 2s/sup 2/2p/sup 4/3snl autoionizing states. The resonances are very narrow, but some have peaks that are several orders of magnitude above the nonresonant background cross section. Even with radiative decay taken into account, the resonances enhance the total integrated cross section by nearly a factor of 4.
Authors:
;
Publication Date:
OSTI Identifier:
6436931
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. A; (United States); Journal Volume: 39:4
Research Org:
High Temperature Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; SELENIUM IONS; ELECTRON-ION COLLISIONS; AUTOIONIZATION; CROSS SECTIONS; EXCITED STATES; GROUND STATES; IONIZATION; RESONANCE; CHARGED PARTICLES; COLLISIONS; ELECTRON COLLISIONS; ENERGY LEVELS; ION COLLISIONS; IONS 640304* -- Atomic, Molecular & Chemical Physics-- Collision Phenomena