L Auger electron production in 0. 3--3. 2-MeV krypton ion-atom collisions

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.3286· OSTI ID:6918749

deGroot, P; Zarcone, M J; Kessel, Q C

Secondary electron production as a consequence of inner-shell vacancy decay for the Kr-Kr system has been studied. Electron-energy spectra differential in impact parameter have been obtained by detecting electrons in coincidence with projectile ions scattered through a known angle. The spectra exhibit structure attributable to Auger decay of L-shell vacancies. The collision-energy dependence of the L Auger yields is consistent with the L-shell excitation being due to rotational coupling of the 4fsigma, 4f..pi.., 4fdelta, and 4fcphi orbitals of the Kr-Kr quasimolecule, as originally proposed by Shanker and co-workers. The L Auger electron energies and relative transition-group intensities suggest that L-shell vacancy decay occurs in Kr ions with initial charge states greater than +10, indicating that a surprisingly large number of electrons are emitted prior to the decay of the L-shell vacancy. These prior ionizations, most of which occur during the collision, are the source of the 100--800-eV continuum electrons that dominate the low-energy region of the electron spectrum.

• Research Organization: Department of Physics and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06268
• OSTI ID: 6918749
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:7; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
AUGER EFFECT
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DECAY
ELECTRON EMISSION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY SPECTRA
FINE STRUCTURE
FLUIDS
GASES
ION COLLISIONS
ION-ATOM COLLISIONS
KRYPTON
L SHELL
MEV RANGE
NONMETALS
POINT DEFECTS
RARE GASES
SPECTRA
VACANCIES