L-auger electron production in krypton ion-atom collisions

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6693895

de Groot, P J

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 were 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, 4f Phi orbitals of the Kr-Kr quasimolecule, as originally proposed by Shanker and coworkers. 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 100-600 eV continuum electrons which dominate the low-energy region of the electron spectrum.

• Research Organization: Connecticut Univ., Storrs (USA)
• OSTI ID: 6693895
• 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
CHARGED PARTICLES
COLLISIONS
ELECTRON EMISSION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
FLUIDS
GASES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KRYPTON
KRYPTON IONS
L SHELL
NONMETALS
RARE GASES
SECONDARY EMISSION