The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies

 

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dc.contributor.advisor Aschman, David G en_ZA
dc.contributor.author Kabutz, Rudolf T en_ZA
dc.date.accessioned 2016-02-29T12:08:18Z
dc.date.available 2016-02-29T12:08:18Z
dc.date.issued 1992 en_ZA
dc.identifier.citation Kabutz, R. 1992. The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/17385
dc.description Bibliography: p. 67-69. en_ZA
dc.description.abstract Using the Time-of-Flight facility at the National Accelerator Centre at Faure, the (p, n) charge-exchange reaction has been studied at intermediate energies of 120, 160 and 200 MeV, and at angles of 0°, 2° and 4°. In this work the data collected for the ⁹⁰Zr target will be presented. The influence on the data from slow neutrons due to previous pulses is discussed and the best manner of removing them from the spectra is recommended. It is shown how the background cosmic rays can be utilised to measure the intrinsic resolution of the detectors and to obtain an estimate of the neutron energy threshold. The differential cross-sections for the states corresponding to Fermi and Gamow-Teller transitions were extracted from the time spectra. The sum of the strength of all the discrete Gamow-Teller states was determined and compared to the Ikeda Sum Rule. It was found that only 50% of the sum could be accounted for in the discrete states. An overview of the theory that has been developed to extract Gamow-Teller strengths from the (p, n) cross-sections is given. Some of the theoretical models that have been used to describe the ⁹⁰Zr(p, n)⁹⁰ Nb reaction and account for the missing Gamow-Teller strength are briefly discussed. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Physics en_ZA
dc.subject.other Particle Physics en_ZA
dc.title The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Physics en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Kabutz, R. T. (1992). <i>The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Physics. Retrieved from http://hdl.handle.net/11427/17385 en_ZA
dc.identifier.chicagocitation Kabutz, Rudolf T. <i>"The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Physics, 1992. http://hdl.handle.net/11427/17385 en_ZA
dc.identifier.vancouvercitation Kabutz RT. The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Physics, 1992 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17385 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Kabutz, Rudolf T AB - Using the Time-of-Flight facility at the National Accelerator Centre at Faure, the (p, n) charge-exchange reaction has been studied at intermediate energies of 120, 160 and 200 MeV, and at angles of 0°, 2° and 4°. In this work the data collected for the ⁹⁰Zr target will be presented. The influence on the data from slow neutrons due to previous pulses is discussed and the best manner of removing them from the spectra is recommended. It is shown how the background cosmic rays can be utilised to measure the intrinsic resolution of the detectors and to obtain an estimate of the neutron energy threshold. The differential cross-sections for the states corresponding to Fermi and Gamow-Teller transitions were extracted from the time spectra. The sum of the strength of all the discrete Gamow-Teller states was determined and compared to the Ikeda Sum Rule. It was found that only 50% of the sum could be accounted for in the discrete states. An overview of the theory that has been developed to extract Gamow-Teller strengths from the (p, n) cross-sections is given. Some of the theoretical models that have been used to describe the ⁹⁰Zr(p, n)⁹⁰ Nb reaction and account for the missing Gamow-Teller strength are briefly discussed. DA - 1992 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1992 T1 - The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies TI - The (p, n) charge-exchange reaction on ⁹⁰Zr at intermediate energies UR - http://hdl.handle.net/11427/17385 ER - en_ZA


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