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Electron Collision Studies Of Cesium Using A Magneto-Optical Trap., John Alexander. Macaskill
Electron Collision Studies Of Cesium Using A Magneto-Optical Trap., John Alexander. Macaskill
Electronic Theses and Dissertations
Experiments involving a magneto-optical trap (MOT) as the target in electron impact cross section studies were carried out. The use of a MOT allows the kinematic properties of the target atoms, and their electronic states, to be controlled via operating parameters of the MOT's lasers. A MOT is capable of saturating the excited state of a gaseous target of atoms and provides a unique opportunity to measure exotic collision processes. Measurements use a trap-loss technique to relate the loss rate of atoms from the trap due to electron interactions to a collision cross section. Total scattering cross section measurements are …
Electron Impact Excitation Studies Of Unstable Atomic Species., Ady Kamel. Abdellatif
Electron Impact Excitation Studies Of Unstable Atomic Species., Ady Kamel. Abdellatif
Electronic Theses and Dissertations
The polarization of Balmer-alpha radiation excited in collisions of electrons with atomic hydrogen is presented for an electron energy range from threshold to 1000 eV. Measurements are in good agreement with calculations carried out using either convergent-close-coupling or R-matrix with pseudo-states approaches. Cascade is demonstrated to have a significant effect. Balmer-alpha excitation function data are also presented. A previous measurement of the polarization of Balmer-alpha following dissociative excitation of H2 by electrons is confirmed and extended. The electron impact excitation spectrum of atomic and molecular nitrogen in the VUV range (800 A--1800 A) is presented. The excitation functions of the …