Photoionization of atoms and small molecules using synchrotron radiation

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:7058703

Ferrett, T A

The combination of synchrotron radiation and time-of-flight electron spectroscopy was used to study the photoionization dynamics of atoms (Li) and small molecules (SF/sub 6/, SiF/sub 4/, and SO/sub 2/). Partial cross sections and angular distribution asymmetry parameters were measured for Auger electrons and photoelectrons as functions of photon energy. Emphasis is on the basic understanding of electron correlation and resonant effects as manifested in the photoemission spectra for these systems. Photoemission results for the 1s main line and 1sn1 satellites (n = 2-5) of atomic Li provide a testing ground for the inclusion of many-electron effects in the theoretical treatment of the simplest open-shell atom. In addition, decay of the doubly excited state 1s(3s3p) of the neutral has also been studied; cross-section profiles for both the 1s2s main lines and the 1s2p conjugate satellites are reported. A number of effects were investigated in the photoionization continua of the molecules SF/sub 6/, SiF/sub 4/, and SO/sub 2/: autoionization, continuum shape resonances, and EXAFS (extended x-ray absorption fine structure).

• Research Organization: California Univ., Berkeley (USA)
• OSTI ID: 7058703
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOMS
BREMSSTRAHLUNG
CHALCOGENIDES
CORRELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON CORRELATION
ELEMENTS
EMISSION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONIZATION
LITHIUM
METALS
MOLECULES
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
PHOTOIONIZATION
RADIATIONS
RESONANCE
SECONDARY EMISSION
SILICON COMPOUNDS
SILICON FLUORIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR FLUORIDES
SULFUR OXIDES
SYNCHROTRON RADIATION