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K-shell ionization of elements Ca to Zn for 0. 5- to 2. 5-MeV/amu /sup 14/N-ion bombardment

Journal Article · · Phys. Rev., A; (United States)
; ; ;
Target K-shell x-ray production cross sections, x-ray energy shifts, and K..beta../K..cap alpha.. ratios have been measured for 7--35-MeV /sup 14/N ions on thin solid films of Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn. Comparisons of the data were made with theoretical predictions obtained from the binary-encounter approximation and the plane-wave Born approximation (PWBA). These theories were found to overpredict the experimental data by a factor of 10 at the lower energies. However, at the lower energies, the PWBA, with modifications for increased target electron binding, Coulomb deflection, target electron polarization, and relativistic effects produced results in good agreement with the experimental data. At higher energies, a systematic deviation of the theoretical predictions from the experimental data was found which increases as the ratio of Z/sub 1//Z/sub 2/ becomes larger. Corrections to the fluorescence yields attributable to multiple ionization processes and the addition of electron capture contributions to the previously indicated direct ionization theories produced results in excellent agreement with the experimental data with the exception of those for the light elements at the highest energies.
Research Organization:
Department of Physics, North Texas State University, Denton, Texas 76203
OSTI ID:
7230208
Journal Information:
Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 15:3; 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
ALKALINE EARTH METALS
ATOM COLLISIONS
BEAMS
CALCIUM
CHARGED PARTICLES
CHROMIUM
COBALT
COLLISIONS
COPPER
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
ION BEAMS
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
IRON
K SHELL
MANGANESE
METALS
MEV RANGE
MEV RANGE 01-10
NICKEL
NITROGEN 14 BEAMS
NITROGEN IONS
SPECTRA
TITANIUM
TRANSITION ELEMENTS
VANADIUM
X-RAY SPECTRA
ZINC