K-shell x-ray production cross-sections in carbon, oxygen, fluorine, sodium, magnesium, and aluminum by 0. 5 to 8. 0 MeV protons, helium, and lithium ions
X-ray production cross sections are reported for elements with K-shell x-ray energies between 277 eV (C) and 1487 eV (Al). These data are reported for incident ions in the energy range 0.5 to 8.0 MeV. These measurements were performed using the 3 MV tandem accelerator at the University of North Texas Ion Beam Modification and Analysis Laboratory. The x-ray measurements were made with a windowless Si(Li) detector that was calibrated for efficiency by comparing bremsstrahlung spectra from electron bombardment of aluminum, silver, and gold with theoretically determined bremsstrahlung spectral distributions. The experimental results of the x-ray cross sections are compared to the predictions of both the first Born and the ECPSSR ionization the theories using single-hole fluorescence yields; each of which is composed of two parts; the direct ionization (DI) of the target electron to the continuum and the capture (EC) of the target electron to the projectile. The first Born theory describes DI by the Plane-Wave-Born-Approximation (PWBA) and EC by the Oppenheimer-Brinkman-Kramers treatment of Nikolaev (OBKN). The ECPSSR theory accounts for the energy loss (E) and Coulomb deflection (C) of the projectile as well as for the perturbed stationary states (PSS) and the relativistic nature (R) of inner shell electrons. The ECPSSR and first Born theoretical predictions are, in close agreement with each other and both generally, fit the proton data quite well. For incident helium and lithium ions, most of the measurement results compare quite favorably with the ECPSSR theory.
- Research Organization:
- Univ. of North Texas, Denton, TX (United States)
- OSTI ID:
- 5258945
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
K -shell x-ray-production cross sections in sub 6 C, sub 8 O, sub 9 F, sub 11 Na, sub 12 Mg, and sub 13 Al by 0. 75- to 4. 5-MeV protons
M-shell electron capture and direct ionization of gold by 25-MeV carbon and 32-MeV oxygen ions
Related Subjects
ALUMINIUM
ION-ATOM COLLISIONS
CARBON
FLUORINE
HELIUM IONS
HYDROGEN IONS 1 PLUS
LITHIUM IONS
MAGNESIUM
OXYGEN
SODIUM
BORN APPROXIMATION
COMPARATIVE EVALUATIONS
CROSS SECTIONS
ELECTRON CAPTURE
ENERGY LOSSES
FLUORESCENCE
INNER-SHELL IONIZATION
MEV RANGE 01-10
SI SEMICONDUCTOR DETECTORS
TANDEM ELECTROSTATIC ACCELERATORS
X RADIATION
ACCELERATORS
ALKALI METALS
ALKALINE EARTH METALS
ATOM COLLISIONS
CAPTURE
CATIONS
CHARGED PARTICLES
COLLISIONS
ELECTROMAGNETIC RADIATION
ELECTROSTATIC ACCELERATORS
ELEMENTS
ENERGY RANGE
EVALUATION
HALOGENS
HYDROGEN IONS
ION COLLISIONS
IONIZATION
IONIZING RADIATIONS
IONS
LOSSES
LUMINESCENCE
MEASURING INSTRUMENTS
METALS
MEV RANGE
NONMETALS
RADIATION DETECTORS
RADIATIONS
SEMICONDUCTOR DETECTORS
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)