This thesis reports on gamma-ray spectroscopy experiments performed to observe transitions between excited states in 112Cs and 113Cs. Five (tentatively six) transitions are assigned to 112Cs using the very selective technique of recoil-decay tagging. Four of these transitions are assigned on the basis of systematics to a band based on the ¼(h11/2) º(h11/2) configuration. These are the first gamma rays assigned to this proton-unstable nucleus. The first, tentative observation of fine structure in the proton-decay of 112Cs is reported. Recoil-decay tagged gamma-ray spectroscopy of 113Cs results in the identification of 22 (tentatively 24) gamma-ray transitions, a slight improvement in the level scheme proposed previously in Ref. [1]. In addition, the order of the transitions within the bands are assigned based on coincidence arguments and gamma-gated intensity measurements. The underlying configurations of the bands are assigned based on blocking arguments, cranked shell model calculations and with reference to the excitation-energy systematics of neighbouring neutron-deficient cesium isotopes. Finally, the differing decay energies reported for the proton decay of 113Cs in previous works are discussed and a possible cause is identified in the form of pile-up of implant and decay events.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:556068 |
| Date | January 2011 |
| Creators | Wady, Paul Thomas |
| Publisher | University of the West of Scotland |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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