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dc.contributor.advisorWoods, Philip
dc.contributor.advisorDavinson, Thomas
dc.contributor.authorGriffin, Christopher James
dc.date.accessioned2019-07-02T11:12:45Z
dc.date.available2019-07-02T11:12:45Z
dc.date.issued2019-07-01
dc.identifier.urihttp://hdl.handle.net/1842/35679
dc.description.abstractThe origin of the heavy elements is one of the most fundamental open questions in modern astrophysics, with a notable difficulty being the lack of a complete description of the rapid neutron-capture process (r-process), a process thought to be responsible for the production of around half of all isotopes heavier than iron. One of the major limitations preventing a detailed understanding of the r-process is the lack of nuclear physics inputs for the nuclei involved. Three key quantities used in r-process calculations are nuclear masses of involved nuclei, their β-decay half-lives and β-delayed neutron emission probabilities. The work herein focuses on measuring decay half-lives. This thesis details the commissioning of and first experiments carried out with the Advanced Implantation Detector Array (AIDA). AIDA features large-area double-sided silicon strip detectors with a high degree of segmentation in combination with purpose-built instrumentation, and is capable of making reliable implant-decay correlations at the high beam currents now available at fragmentation beam facilities. Thanks to the large yields of neutron-rich isotopes available at the Radioactive Ion Beam Factory (RIBF), in June 2016 AIDA was used to study r-process nuclei in the vicinity of 90/34Se, using a novel method in which nuclear masses and β-decay half-lives were measured simultaneously. Presented within are the first half-lives obtained through the analysis of the data collected during this experiment, five of which have been measured for the first time. Going forward, AIDA will be used with the β-delayed neutron emission at RIKEN (BRIKEN) detector to measure β-delayed neutron emission probabilities of r-process nuclei and at the Facility for Antiproton and Ion Research (FAIR) at GSI as part of the Decay Spectroscopy (DESPEC) experiments.en
dc.contributor.sponsorScience and Technology Facilities Council (STFC)en
dc.language.isoenen
dc.publisherThe University of Edinburghen
dc.relation.hasversionR. Griffn et al., HD 115444-a barium star of extreme Population II, Monthly Notices of the Royal Astronomical Society, vol. 198, no. 3, pp. 637- 658, 1982.en
dc.subjectAdvanced Implantation Detector Arrayen
dc.subjectAIDAen
dc.subjectRIBFen
dc.subjectnucleien
dc.subjecthalf-lifeen
dc.subjectr-processen
dc.titleβ-decay studies of r-process nuclei using the Advanced Implantation Detector Array (AIDA)en
dc.typeThesis or Dissertationen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD Doctor of Philosophyen
dc.rights.embargodate2020-07-01en
dcterms.accessRightsRestricted Accessen


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