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Alpha decay and alpha elastic scattering by heavy nuclei
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Physics
2016
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| _version_ | 1867614430753193984 |
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| access_status_str | Open Access |
| author | Tripe, Peter |
| author2 | Perez, Sandro M |
| author_browse | Perez, Sandro M Tripe, Peter |
| author_facet | Perez, Sandro M Tripe, Peter |
| author_sort | Tripe, Peter |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17411 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:51:55.559Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Physics |
| publisherStr | Department of Physics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/17411 Alpha decay and alpha elastic scattering by heavy nuclei Tripe, Peter Perez, Sandro M Physics Nuclear Physics Includes bibliographical references. A simple three parameter cluster model has previously been developed by Buck, Merchant and Perez to successfully describe alpha decay half lives for more than 400 nuclei. An important feature of this model is that it envisages preformed (preformation factor, P=1.0) alpha particles in the parent nuclei to be moving in orbits with a large value of a global quantum number, G. The discontinuity in decay half-lives at the N=l26 neutron shell closure is then naturally explained by an increase of G as the alpha particle is forced into a higher orbit by the shell closure. We consider alternative approaches to this model and extend it to consider different values of P, and different changes in G at shell closures. We find the original approach of Buck et al., a radius fit with ΔG=2, is still the most successful, but that a potential fit with ΔG=4 turns out to be competitive, lending support to the suggestion that the proton shell closure is also felt. We have also analysed low energy (24.7MeV) scattering of alpha particles from a number of heavy nuclei in an attempt to find a common set of potential parameters that adequately reproduces both the decay and scattering data. Although not completely successful in this attempt, we find that the potential parameters obtained in the decay calculations provide a good first guess at the scattering potential parameters. The above analysis constrains P to the range 0.01≤P≤0.1, with the value of P=1.0 not ruled out. 2016-03-01T07:46:48Z 2016-03-01T07:46:48Z 1993 Master Thesis Masters MSc http://hdl.handle.net/11427/17411 eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Physics Nuclear Physics Tripe, Peter Alpha decay and alpha elastic scattering by heavy nuclei |
| thesis_degree_str | Master's |
| title | Alpha decay and alpha elastic scattering by heavy nuclei |
| title_full | Alpha decay and alpha elastic scattering by heavy nuclei |
| title_fullStr | Alpha decay and alpha elastic scattering by heavy nuclei |
| title_full_unstemmed | Alpha decay and alpha elastic scattering by heavy nuclei |
| title_short | Alpha decay and alpha elastic scattering by heavy nuclei |
| title_sort | alpha decay and alpha elastic scattering by heavy nuclei |
| topic | Physics Nuclear Physics |
| url | http://hdl.handle.net/11427/17411 |
| work_keys_str_mv | AT tripepeter alphadecayandalphaelasticscatteringbyheavynuclei |