Date of Award
Doctor of Philosophy (PhD)
Gary E. Copeland
J. Wallace Van Orden
Mark D. Havey
Lawrence B. Weinstein
Robert L. Ake
Radiative transitions of hydrogenlike atoms in external magnetic fields of strength applicable to magnetic white dwarfs, i.e. B < 103 megagauss, have been investigated for field-free principal quantum numbers n < 6. Finite proton mass corrections are included. Relativistic corrections are also investigated. Transition probabilities are determined using the length, velocity, and acceleration forms of the electric dipole operator. Discrepancies between previous calculations and magnetic white dwarf observations of low-lying boundbound transitions have been studied. New results for high-lying transitions are also obtained.
The transition probability for the hydrogenlike 2s two-photon decay has been investigated and shown to increase substantially with field strength. The computed two-photon spectra show resonances and interference minima. Anomalous Zeeman depolarization features are found in computed two-photon polarization spectra of alkali atoms in laboratory strength magnetic fields. A previously observed fine structure depolarization feature is shown to decay with decreasing field strength.
Stancil, Phillip C..
"Strong Magnetic Field Effects and Molecular Processes with Applications to White Dwarfs"
(1994). Doctor of Philosophy (PhD), Dissertation, Physics, Old Dominion University, DOI: 10.25777/fxg0-7j95