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Title: K-electron capture to positron emission ratios in allowed transitions
Author: Fitzpatrick, Margaret Lynne
ISNI:       0000 0001 3468 1308
Awarding Body: University of Glasgow
Current Institution: University of Glasgow
Date of Award: 1974
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This thesis describes measurements of the ratios for the K/beta+ ratios for the decays of [30]P and [91]Mo to the ground states of [30]Si and [91]Nb, respectively, and the ft values of the weak transitions to excited states of these nuclei. It also contains a review of all available experimental values of K/beta+ and epsilon/beta[+] ratios for allowed transitions. The work was carried out at the Kelvin Laboratory, University of Glasgow, between October 1969 and October 1973, excluding the period from October 1971 to January 1972. The first chapter contains an introduction to beta decay theory. Orbital electron capture, particularly K-capture, is considered and a theoretical expression given for the ratio of K-electron capture to positron emission for allowed transitions. The following chapter examines the agreement between experimental and theoretical values of the K/beta+ ratio for nuclei with Z ≤ 15. The review of K/beta+ measurements in this region was carried out in collaboration with Ur K. W. D. Ledingham and Dr J. Y. Gourlay. The measurement of the K/beta+ of [30]P ratio described in this chapter was performed by Dr Gourlay and Lr Ledingham together with Dr J. G. Lynch. The present author assisted in the analysis of some of the data. A description of the [30]P experiment is included since it is typical of the low Z K/beta+ measurements and demonstrates the experimental techniques applicable in this region. The experimental K/beta+ ratios for the low Z region are compared with theoretical K/beta+ ratios calculated by the author and Dr Gourlay employing published tables of Fermi functions.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available