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Energy correlations of prompt neutrons from 252Cf fission
Measurements have been made of the neutron-neutron energy correlations for coincident neutrons emitted in the spontaneous fission of ²⁵²Cf. The hypothesis that cooling of the fission fragments during the cascade evaporation of prompt neutrons affects the energies of successive neutrons in a cascade...
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| Format: | Thesis |
| Language: | English |
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Department of Physics
2016
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| _version_ | 1867613188723310592 |
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| access_status_str | Open Access |
| author | Whittal, David Mark |
| author2 | Brooks, F D |
| author_browse | Brooks, F D Whittal, David Mark |
| author_facet | Brooks, F D Whittal, David Mark |
| author_sort | Whittal, David Mark |
| collection | Thesis |
| description | Measurements have been made of the neutron-neutron energy correlations for coincident neutrons emitted in the spontaneous fission of ²⁵²Cf. The hypothesis that cooling of the fission fragments during the cascade evaporation of prompt neutrons affects the energies of successive neutrons in a cascade has been investigated by a comparison of the energy correlations of coincident neutrons from the same fragment with those of coincident neutrons from opposite fragments in the same fission. It is found that the energies of coincident neutrons are posftively correlated and that the correlation coefficient is greater for neutrons from opposite fragments than for neutrons from the same fragment. This provides a sensitive test of the nature of neutron emission in an evaporation cascade. The energy correlations of random (noncoincidental) neutrons have also been investigated and are found to show similar but smaller correlation trends. It is concluded that there is some evidence for the cascade cooling effect on the energies of prompt fission neutrons. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17906 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:11.035Z |
| 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:11427/17906 Energy correlations of prompt neutrons from 252Cf fission Whittal, David Mark Brooks, F D Physics Neutrons Nuclear fission Measurements have been made of the neutron-neutron energy correlations for coincident neutrons emitted in the spontaneous fission of ²⁵²Cf. The hypothesis that cooling of the fission fragments during the cascade evaporation of prompt neutrons affects the energies of successive neutrons in a cascade has been investigated by a comparison of the energy correlations of coincident neutrons from the same fragment with those of coincident neutrons from opposite fragments in the same fission. It is found that the energies of coincident neutrons are posftively correlated and that the correlation coefficient is greater for neutrons from opposite fragments than for neutrons from the same fragment. This provides a sensitive test of the nature of neutron emission in an evaporation cascade. The energy correlations of random (noncoincidental) neutrons have also been investigated and are found to show similar but smaller correlation trends. It is concluded that there is some evidence for the cascade cooling effect on the energies of prompt fission neutrons. 2016-03-17T07:19:35Z 2016-03-17T07:19:35Z 1983 Master Thesis Masters MSc http://hdl.handle.net/11427/17906 eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Physics Neutrons Nuclear fission Whittal, David Mark Energy correlations of prompt neutrons from 252Cf fission |
| thesis_degree_str | Master's |
| title | Energy correlations of prompt neutrons from 252Cf fission |
| title_full | Energy correlations of prompt neutrons from 252Cf fission |
| title_fullStr | Energy correlations of prompt neutrons from 252Cf fission |
| title_full_unstemmed | Energy correlations of prompt neutrons from 252Cf fission |
| title_short | Energy correlations of prompt neutrons from 252Cf fission |
| title_sort | energy correlations of prompt neutrons from 252cf fission |
| topic | Physics Neutrons Nuclear fission |
| url | http://hdl.handle.net/11427/17906 |
| work_keys_str_mv | AT whittaldavidmark energycorrelationsofpromptneutronsfrom252cffission |