K -shell-ionization cross sections for low- Z elements (11 le Z le 22) by protons in the energy range 0. 5--2. 5 MeV

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.7860· OSTI ID:7286192

Tribedi, L C; Tandon, P N ^[1]

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1. Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay 400 005 (India)

{ital K}-shell-ionization cross sections for Na, Mg, Al, Si, Cl, K, Ca, and Ti by protons in the energy range 0.5--2.5 MeV have been measured using thin targets. Measurements have also been performed for thin targets of Fe, Ni, and Cu at a few energies. The energy range of protons for these targets corresponds to the reduced velocity ({ital v}{sub 1}/{ital v}{sub 2{ital K}}) range 0.2--1.1, in which the cross sections are very sensitive to the increased binding energy and the Coulomb-deflection effects. The measured ionization cross sections are compared with the predictions of the theory based on the perturbed-stationary-state approach including the Coulomb-deflection, energy-loss, and relativistic corrections. The data have been scaled according to various scaling laws to test the validity of the universal nature of the various Coulomb ionization theories based on the plane-wave Born approximation, the binary-encounter approximation, and the simplified semiclassical approximation model as given by L{ae}gsgaard, Andersen, and Lund (in {ital Proceedings} {ital of} {ital the} {ital Tenth} {ital International} {ital Conference} {ital on} {ital the} {ital Physics} {ital of} {ital Electronic} {ital and} {ital Atomic} {ital Collisions}, edited by G. Watel (North-Holland, Amsterdam, 1978), p. 353). The measured data have also been compared with the calculations of Montenegro and Siguad (J. Phys. B 18, 299 (1985)) based on the theory of 1{ital s}{sigma} molecular-orbital ionization.

• OSTI ID: 7286192
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:11; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ALKALINE EARTH METALS
ALUMINIUM
ATOM COLLISIONS
BARYONS
BINDING ENERGY
CALCIUM
CHEMICAL ANALYSIS
CHLORINE
COLLISIONS
CROSS SECTIONS
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY RANGE
FERMIONS
FOILS
HADRONS
HALOGENS
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
K SHELL
KEV RANGE
KEV RANGE 100-1000
MAGNESIUM
METALS
MEV RANGE
MEV RANGE 01-10
NONDESTRUCTIVE ANALYSIS
NONMETALS
NUCLEONS
POTASSIUM
PROTONS
SEMIMETALS
SILICON
SODIUM
TITANIUM
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS