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Physics Commons

Open Access. Powered by Scholars. Published by Universities.®

1994

Atlanta University Center

Articles 1 - 2 of 2

Full-Text Articles in Physics

A Study Of Small Angle Differential And Integral Cross Sections For K 4s-4p Transition, Peter A. Ozimba Jun 1994

A Study Of Small Angle Differential And Integral Cross Sections For K 4s-4p Transition, Peter A. Ozimba

ETD Collection for AUC Robert W. Woodruff Library

Measured and calculated differential cross sections(DCS) are contrasted through the generalized ocsillator strength for impact energies of 16, 20, 40, 54.4, 60, 75, 100 and 200 eV. The recently constructed universal formula by Msezane and Sakmar is used to compare these results. Most of the results require renormalization and also show inaccuracy at small scattering angles. By also using the cubic spline function and the constructed formula from the universal formula, for the integral cross section by Chen and Msezane, total cross sections are calculated. These integral cross sections which serve as a good check to the measured ...


Molecular Dynamics And Simulations Studies Of Metal Surfaces, Akie M. Raphuthi Jun 1994

Molecular Dynamics And Simulations Studies Of Metal Surfaces, Akie M. Raphuthi

ETD Collection for AUC Robert W. Woodruff Library

Bulk phonon spectra for several noble metals have been investigated, and the results are being reported in this thesis. The parameters appearing in the semi empirical glue model, are fitted to several physical properties of the noble metals.

The calculation of the surface structure and dynamics of (100), (110), and (111) surfaces of aluminum using molecular dynamics and an empirical many body interatomic potential is presented. The multilayer relaxation of these surfaces was calculated by use of simulated annealing. Surface phonon spectra at finite, low temperatures was calculated by means of time-dependent correlation functions. Results are compared with experimental measurements ...