Perturbative and Nonperturbative Calculations of Electron-Hydrogen Ionization

We compare calculations of the fully differential cross section for ionization of atomic hydrogen by electron impact using two different theories-the perturbative CDW-EIS (continuum distorted wave with eikonal initial state) approximation and the nonperturbative ECS (exterior complex scaling) method. For this comparison, we chose an impact energy of 54.4 eV, since this is near the lowest energy that our perturbative approach would be applicable and near the highest energy that can be tackled by the ECS method with our present computational resources. For the case of equal-energy outgoing electrons investigated here, the two theories predict nearly identical results except that CDW-EIS underestimates the ECS values nearly uniformly by about 30%. Interestingly, when initial-state projectile-target interactions are neglected by replacing the eikonal initial state with the unperturbed initial state (the approximation of Brauner, Briggs, and Klar @J. Phys. B 22, (2265) (1989:]). the cross section oscillates by &plusmn50% about the ECS values

Fine-structure effect for (e,2e) collisions

For the case of inelastic electron-atom scattering, it has been known for some time that significant spin effects may be observed even if spin-dependent forces on the projectile can be ignored. These spin effects result from the Pauli principle and this phenomenon has become known as the fine-structure effect. Recently, the question of whether or not these same types of effects should be observed for atomic ionization has been considered and the initial indications are that significant spin asymmetries can also be expected for atomic ionization if the final ion satisfies LS coupling and the final J state of the ion can be resolved. In this paper, we consider this problem for electron-impact ionization of inert gases. The theory of the fine-structure effect is presented for ionization and first-order distorted-wave results are compared with very recent experimental data

Participative Decisions and Organizational Commitment: A Quantitative Analysis

William (Bill) H. Sumrall, Ed.D., is associate professor of business administration, Memphis campus, Belhaven College, Memphis, TN, 38137. David W. Cox, Ed.D., is professor of education, Arkansas State University, Jonesboro, AR, 72467. D. Adrian Doss, Ph.D.,is assistant professor of business administration, Memphis campus, Belhaven College, Memphis, TN, 38137. Don W. Jones, M.B.A., M.Div., is enrollment manager, Memphis campus, Belhaven College, Memphis, TN, 38137. Recipient, Best Paper Award, 28th Annual Southern Industrial Relations and Human Resource Conference (SIRHRC), Savannah, GA 31401