Bishop, Jack Edward (2018). Experimental investigation of alpha-gas states using high-multiplicity particle spectroscopy. University of Birmingham. Ph.D.
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Bishop2018PhD.pdf
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Abstract
The onset of a new state of matter in the nucleus, whereby the system can be described as a dilute gas of alpha-particles, represents a fantastic probe of the nuclear force. The observables from such an alpha-gas state are discussed here in tandem with a discussion of traditional alpha-cluster structure. An experiment, utilising a high energy compound nucleus reaction to study the \(^1\)\(^2\)C(\(^1\)\(^6\)0,7-alpha) reaction was performed at LNS Catania to search for the signatures of such a state of matter. Direct evidence of near-threshold alpha-gas states was found to be impeded by the effect of the Coulomb barrier. The break-up of the system into alpha-particles was seen to exceed the predictions from a statistical decay model of the compound nucleus which was performed. These results were instead compared with the Fermi break-up model which showed a greater agreement with the data but the limitations of the model meant an exact agreement was not achieved. No evidence of alpha-condensation was found in this experiment however an improved experiment where the effect of the Coulomb barrier is no longer important is presented as a future probe of this structure.
| Type of Work: | Thesis (Doctorates > Ph.D.) | |||||||||
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| Award Type: | Doctorates > Ph.D. | |||||||||
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| College/Faculty: | Colleges (2008 onwards) > College of Engineering & Physical Sciences | |||||||||
| School or Department: | School of Physics and Astronomy | |||||||||
| Funders: | None/not applicable | |||||||||
| Subjects: | Q Science > QC Physics | |||||||||
| URI: | http://etheses.bham.ac.uk/id/eprint/8347 |
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