Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions

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dc.contributor.authorBecker, Bruceen_ZA
dc.date.accessioned2014-09-08T14:27:31Z
dc.date.available2014-09-08T14:27:31Z
dc.date.issued2002en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractInclusive continuum cross-sections for the reactions 93Nb(12C,7Be) and 93Nb(12C,9Be) were measured at the NAC using a ΔE - E setup. A theoretical light output model which could account for the mass and charge dependance of the NaI E detectors was employed to calibrate the NaI(TI) detectors. The model is outlined and it is shown that the nonlinearity of the detector response is only due to a term which describes the mass-dependance. Investigation of the cross-sections revealed interesting facts about the dominant reaction mechanisms in the interaction of 120 with heavy targets. A theoretical model developed by the Milano group has been very successful in describing the continuum cross-sections of a particles (including 9Be) created in similar reactions of 120 and 160, incident on heavy targets. The analysis shows that the same description of the continuum cross-sections of 7Be and 9Be gives good agreement with the data (with different energy-loss parameters and survival probabilities), although there are discrepancies, especially at the lower incident angles. These small discrepancies may indicate the presence of a multistep direct reaction between the detected fragment and the residual nucleus in the exit channel. The most notable result of the analysis of the data was that the spectra of 7Be and 9Be, previously suspected to be created in a final-state interaction of sBe with the residual nucleus, are well-described by a friction-dissipative breakup mechanism.en_ZA
dc.identifier.apacitationBecker, B. (2002). <i>Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Physics. Retrieved from http://hdl.handle.net/11427/6993en_ZA
dc.identifier.chicagocitationBecker, Bruce. <i>"Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Physics, 2002. http://hdl.handle.net/11427/6993en_ZA
dc.identifier.citationBecker, B. 2002. Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Becker, Bruce AB - Inclusive continuum cross-sections for the reactions 93Nb(12C,7Be) and 93Nb(12C,9Be) were measured at the NAC using a ΔE - E setup. A theoretical light output model which could account for the mass and charge dependance of the NaI E detectors was employed to calibrate the NaI(TI) detectors. The model is outlined and it is shown that the nonlinearity of the detector response is only due to a term which describes the mass-dependance. Investigation of the cross-sections revealed interesting facts about the dominant reaction mechanisms in the interaction of 120 with heavy targets. A theoretical model developed by the Milano group has been very successful in describing the continuum cross-sections of a particles (including 9Be) created in similar reactions of 120 and 160, incident on heavy targets. The analysis shows that the same description of the continuum cross-sections of 7Be and 9Be gives good agreement with the data (with different energy-loss parameters and survival probabilities), although there are discrepancies, especially at the lower incident angles. These small discrepancies may indicate the presence of a multistep direct reaction between the detected fragment and the residual nucleus in the exit channel. The most notable result of the analysis of the data was that the spectra of 7Be and 9Be, previously suspected to be created in a final-state interaction of sBe with the residual nucleus, are well-described by a friction-dissipative breakup mechanism. DA - 2002 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2002 T1 - Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions TI - Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions UR - http://hdl.handle.net/11427/6993 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/6993
dc.identifier.vancouvercitationBecker B. Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Physics, 2002 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/6993en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Physicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherPhysicsen_ZA
dc.titleInvestigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactionsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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