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Title: An experimental study of autoionizing transitions in metal vapour atoms
Author: Ford, Michael John
ISNI:       0000 0001 3474 2131
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 1989
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Autoionization processes have been investigated in atomic vapour beams of the metallic elements europium, samarium and manganese using a crossed-beam ejected-electron spectrometer. Autoionizing and Auger transitions have been observed in the high resolution ejected-electron spectra following excitation by an incident electron beam of between 15 and 500 eV kinetic energy. Many previously unobserved transitions have been reported, and in particular the ejected-electron spectrum of samarium has been reported for the first time. Excitation by an electron beam of variable energy has allowed dipole-forbidden transitions to be observed at low incident electron kinetic energies, dipole-allowed transitions were generally found to dominate the spectra at high incident electron kinetic energies. Digital data processing techniques have been implemented on a microcomputer in order to facilitate analysis of the observed spectra. Assignment of atomic transitions to the ejected-electron spectra have been made by comparison with experimental and theoretical data. In addition, assignments have been made by comparison with the results of Hartree-Fock calculations performed by Dr. M. Wilson, and by the identification of Rydberg series from quantum defect calculations.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Atomic physics & molecular physics