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Title: Collinear laser spectroscopy of the 178Hf S- isomer and the 18<>-ra naturally occurring isomer
Author: Lloyd, Bissell
ISNI:       0000 0001 3611 6003
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2007
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The work presented in this thesis was conducted as part of an ongoing investigation into the properties of multi quasiparticle isomers. Specifically, collinear laser spectroscopy was perfonned on singly ionized 178Hf. Laser induced fluorescence spectra of the 301.3 nm transition were recorded from which the isomer shift between the 178Hf ground state and the r=s- isomer was obtained along with the hyperfine structure associated with this isomer, With these measurements it was possible to detennine the change in mean square charge radius between the ground state and isomer and also its magnetic and elec;:trostatic quadrupole moments. The observed properties of this isomer have been used in conjunction with measurements ofother isomeric systems to explore the origins of the decrease in charge radii of multi quasi-particle isomers, a phenomenon observed in all systems ofthis type measured to date. With the objective of extending this work on the properties ofmulti quasi-particle isomers, off-line measurements of transitions in singly charged Ta were conducted. Strong second order contributions to the hyperfine structures were observed. With a full description of these contributions, it was possible to unambiguously detennine the spin of the 18<>-ra naturally occurring isomer along with its magnetic and electrostatic quadrupole moments.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available