Comparison of heavy ion-induced K-alpha x-ray satellite spectra from gases and solids. [32. 4-MeV O ions]

Technical Report · Thu Dec 01 04:00:00 EST 1977

OSTI ID:6672651

Demarest, J A

A study of the effects of chemical environment on the K-alpha satellite spectra of Si, SiF/sub 4/, SiH/sub 4/, P/sub 4/, S/sub 8/, SF/sub 6/, SO/sub 2/, H/sub 2/S, NaCl, KCl (Cl), CCl/sub 4/, Cl/sub 2/, HCl, Ar and KCl (K) excited by 32.4-MeV oxygen ions has been performed. The average degree of L-shell ionization at the time of K-alpha x-ray emission (as reflected by the satellite relative intensities) is much higher for the light gases SiH/sub 4/, H/sub 2/S, and HCl than for the corresponding heavy gases, solids, and liquid. It was determined from their correlation with local valence electron density that the L-shell ionization states do not depend upon physical state but upon the availability of electrons from neighboring atoms. For atoms with electron-rich ligands, interatomic electron transfer dominates the fast rearrangement occurring prior to K-alpha x-ray emission. The comparison of K-alpha satellite energy shifts with the results of Hartree-Fock calculations provided further support for the above conclusions. A theoretical prediction of multiple ionization employing the binary encounter approximation was found to overestimate the observed degree of L-shell ionization, but considerably improved agreement was obtained by accounting for the increases in L-shell binding energy as L-shell electrons are removed.

• Research Organization: Air Force Inst. of Tech., Wright-Patterson AFB, OH (USA)
• OSTI ID: 6672651
• Report Number(s): AD-A-050006; AFIT-CI-78-31
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
ARGON
ATOM COLLISIONS
BINARY ENCOUNTER METHOD
BINDING ENERGY
CARBON TETRACHLORIDE
CHALCOGENIDES
CHARGED PARTICLES
CHLORIDES
CHLORINATED ALIPHATIC HYDROCARBONS
CHLORINE
CHLORINE COMPOUNDS
COLLISIONS
ELEMENTS
ENERGY
ENERGY RANGE
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
HALOGENS
HARTREE-FOCK METHOD
HYDRIDES
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INORGANIC ACIDS
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
IONS
MEV RANGE
MEV RANGE 10-100
MOLECULE COLLISIONS
NONMETALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OXYGEN IONS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RARE GASES
SEMIMETALS
SILANES
SILICON
SILICON COMPOUNDS
SILICON FLUORIDES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SPECTRA
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR FLUORIDES
SULFUR OXIDES
X-RAY SPECTRA