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Title: Study of auto-ionization probability following nuclear beta decay
Author: Ateek, Mariam Mokhtar
ISNI:       0000 0001 3431 5244
Awarding Body: University of London
Current Institution: Royal Holloway, University of London
Date of Award: 1975
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The purpose of the work was a study of autoionization phenomenon following nuclear beta--decay. Three approaches have been adopted in this respect, first, a study of total internal ionization probability and internal ionization probability as a function of beta--particle energy, using a coincidence technique between emitted electrons (beta--particles + orbital electrons) and subsequent K X-rays. Two isotopes have been studied using this approach, thallium-204 and promethium-147, where measurements of internal ionization probabilities for K-electrons are presented and results are discussed in terms of available theoretical treatments on total internal ionization. A second approach was applied in the case of thallium-204 where the internal ionization probability for K-electrons is deduced by comparison of mercury K X-rays resulting from an electron capture process with lead K X-rays due to the studied phenomenon. The third approach was applied in a measurement on erbium-169 using the straight forward technique of comparing the 118 Kev gamma-ray transition with thulium K X-rays and cn upper limit for K-shell internal ionization probability has been estimated. Difficulties and drawbacks of the experiment have been discussed. The two solid state detectors used in this work were a lithium drifted silicon detector for electrons and lithium drifted germanium X-ray detector for photons.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Nuclear Physics And Radiation