Dynamics of atomic photoionization: Studies with synchrotron radiation

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6047241

Whitfield, S B

The mechanisms that lead to states with three and four 3d vacancies following L-shell photoionization of metallic Ni have been investigated with synchrotron radiation. Vacancies were crated in all three L subshells, in the L{sub 2,3} subshells, and the L{sub 3} subshell alone, and the resultant L{sub 3}-M{sub 4,5}M{sub 4,5} Auger spectrum with its satellite structure was measured and analyzed. Auger diagram and satellite energies were computed in terms of a quasiatomic screening model, semiempirical shakeup and shakeoff cross sections were employed, and branching ratios were calculated from Auger transition theory with Hartree-Fock wave functions. In addition, the process which leads to the recapture of photoelectrons following near-threshold 2p photoionization of Ar has been investigated. The Russek-Mehlhorn semiclassical formalism of post-collision interaction was used to develop a theoretical model of the photoelectron recapture process. This model agrees well with the experimental data on Ar ion yields obtained with synchrotron radiation.

• Research Organization: Oregon Univ., Eugene, OR (USA)
• OSTI ID: 6047241
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
AUGER EFFECT
BRANCHING RATIO
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
FLUIDS
FUNCTIONS
GASES
IONIZATION
METALS
NICKEL
NONMETALS
PHOTOIONIZATION
RADIATIONS
RARE GASES
SYNCHROTRON RADIATION
TRANSITION ELEMENTS
WAVE FUNCTIONS