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K-italic-shell ionization cross sections for Al, Ti, V, Cr, Fe, Ni, Cu, and Ag by protons and oxygen ions in the energy range 0. 3--6. 4 MeV

Journal Article · · Phys. Rev. A; (United States)
;
Absolute K-italic-shell ionization cross sections have been measured for thin targets of Al, Ti, and Cu for protons in the energy range 0.3--2.0 MeV and for thin targets of Ti, V, Cr, Fe, Ni, Cu, and Ag for oxygen ions in the energy range 1.36--6.4 Mev. The experimental results are compared to the perturbed-stationary-state (PSS) approximation with energy-loss (E), Coulomb (C), and relativistic (R) corrections, i.e., the ECPSSR approximation (Brandt and Lapicki), to the semiclassical approximation (Laegsgaard, Andersen, and Lund), and to a theory for direct Coulomb ionization of the 1s-italicsigma molecular orbital (Montenegro and Sigaud (MS)). The proton results agree within 3% with empirical reference cross sections. Also, the ECPSSR provides best overall agreement for protons. For oxygen ions, ECPSSR and MS predict experimental results satisfactorily for scaled velocities xi> or =0.4. For lower scaled velocities, the experimental cross sections become considerably higher than theoretical predictions for Coulomb ionization. This deviation increases with increasing Z-italic/sub 1//Z/sub 2/; it cannot be explained by electron transfer to the projectile or by ionization due to target recoil atoms.
Research Organization:
Institut fuer Experimentalphysik, Johannes-Kepler-Universitat Linz, A-4040 Linz, Austria
OSTI ID:
5571550
Journal Information:
Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 34:2; ISSN PLRAA
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM
ATOM COLLISIONS
CATIONS
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHROMIUM
COLLISIONS
COPPER
CROSS SECTIONS
DATA
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INFORMATION
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
IRON
K SHELL
KEV RANGE
KEV RANGE 100-1000
METALS
MEV RANGE
MEV RANGE 01-10
NICKEL
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
OXYGEN IONS
PERTURBATION THEORY
SEMICLASSICAL APPROXIMATION
SILVER
TITANIUM
TRANSITION ELEMENTS
VANADIUM
X-RAY EMISSION ANALYSIS