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dc.contributor.authorKarvonen, Pasi
dc.date.accessioned2010-10-04T06:55:39Z
dc.date.available2010-10-04T06:55:39Z
dc.date.issued2010
dc.identifier.isbn978-951-39-4025-6
dc.identifier.otheroai:jykdok.linneanet.fi:1136810
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/25360
dc.description.abstractThis thesis work consists of two sections. In the first section, the development of a so-called Laser Ion Source Trap (LIST) device is described. The LIST device is based on a double SPIG (SextuPole Ion Guide) system, providing the possibility to improve the elemental selectivity of the IGISOL method via highly discriminative laser ionization occurring outside the ion guide. The improved selectivity enables the production of isotopically pure beams. The double SPIG can be used without laser ionization and replaces the conventional skimmer electrode. In this work, the SPIG is compared to the skimmer and is shown to remarkably improve both the efficiency and beam quality of the IGISOL facility. The second section introduces a novel method for isotopic fission yield measurements. Accurate fission product yield data are important in many fields of physics. Previous experimental techniques are either limited to certain mass regions of the fission products, or lead to inaccurate and/or time consuming yield deduction. The technique described in this work is a successful combination of the universal IGISOL method and an unambiguous isobaric purification of the JYFLTRAP facility. This combination is able to provide pure samples of almost any isotope produced in fission. These samples are directly counted using a highly sensitive MCP - detector, significantly shortening the measurement time as compared to traditional detection methods such as a gamma-spectroscopy.en
dc.format.extentxii, 159 sivua
dc.language.isoeng
dc.publisherUniversity of Jyväskylä
dc.relation.ispartofseriesResearch report / Department of Physics, University of Jyväskylä
dc.relation.isversionofISBN 978-951-39-4024-9
dc.subject.othermeasurements
dc.subject.othernuclear data
dc.subject.otherfission yield
dc.subject.otherLaser Ion Source Trap
dc.subject.otherIGISOL
dc.subject.otherSPIG
dc.titleFission yield studies with SPIG-equipped IGISOL : a novel method for nuclear data measurements
dc.typeDiss.fi
dc.identifier.urnURN:ISBN:978-951-39-4025-6
dc.type.dcmitypeTexten
dc.type.ontasotVäitöskirjafi
dc.type.ontasotDoctoral dissertationen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Mathematics and Scienceen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineFysiikkafi
dc.relation.issn0075-465X
dc.relation.numberinseriesno. 7/2010
dc.rights.accesslevelopenAccessfi
dc.subject.ysoydinreaktiot
dc.subject.ysofissio


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