Projectile Auger spectra of gas- and foil-excited oxygen ions at MeV energies

Journal Article · Thu Feb 01 04:00:00 EST 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.19.587· OSTI ID:6467456

Bruch, R; Schneider, D; Schwarz, W H.E.; Meinhart, M; Johnson, B M; Taulbjerg, K

High resolution projectile Auger spectra of singly and doubly core-excited oxygen ions are studied as a function of incident beam energy (2--18 MeV), exciter gas (helium, neon, argon, and krypton) or foil (carbon), incident charge state (1+--4+), and delay time. Auger electron production from excited oxygen states varies considerably for collisions with different beam energies and exciter gases. A striking similarity in both the linewidths and relative Auger line intensities is observed for single collision gas and multiple collision foil excitation. The incident ion charge state does not appreciably affect the excitation cross sections and the charge state of the outgoing projectile. In order to assign the measured Auger peaks numerous excitation and Auger transition energies for singly and doubly core-excited states are calculated using semiempirical and ab initio methods. Calculated transition energies are compared with experimental line structures. Possible excitation and deexcitation mechanisms are suggested and discussed within a quasimolecular single-particle model.

• Research Organization: Fakultaet fuer Physik, Universitaet Freiburg, D-7800 Freiburg, West Germany
• OSTI ID: 6467456
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 19:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
AUGER EFFECT
BEAMS
CARBON
CHARGED PARTICLES
COLLISIONS
CRYOGENIC FLUIDS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
FLUIDS
FOILS
HELIUM
ION BEAMS
ION COLLISIONS
ION SPECTROSCOPY
ION-ATOM COLLISIONS
IONIZATION
IONS
KRYPTON
LEPTONS
MEV RANGE
MEV RANGE 01-10
NEON
NONMETALS
OXYGEN IONS
RARE GASES
SPECTRA
SPECTROSCOPY