Fission yield studies with SPIG-equipped IGISOL : a novel method for nuclear data measurements

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Show simple item record Karvonen, Pasi 2010-10-04T06:55:39Z 2010-10-04T06:55:39Z 2010
dc.identifier.isbn 978-951-39-4025-6
dc.identifier.issn 0075-465X
dc.identifier.uri en
dc.description.abstract This 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.extent xii, 159 sivua
dc.language.iso eng
dc.publisher University of Jyväskylä
dc.relation.ispartofseries Research report / Department of Physics, University of Jyväskylä no. 7/2010.
dc.relation.isversionof ISBN 978-951-39-4024-9
dc.rights openAccess fi
dc.subject.other measurements
dc.subject.other nuclear data
dc.subject.other fission yield
dc.subject.other Laser Ion Source Trap
dc.subject.other IGISOL
dc.subject.other SPIG
dc.title Fission yield studies with SPIG-equipped IGISOL : a novel method for nuclear data measurements
dc.type Diss. fi
dc.identifier.urn URN:ISBN:978-951-39-4025-6
dc.subject.ysa ydinreaktiot
dc.subject.ysa fissio
dc.subject.kota 114
dc.type.dcmitype Text en
dc.type.ontasot Väitöskirja fi
dc.type.ontasot Doctoral dissertation en
dc.contributor.tiedekunta Matemaattis-luonnontieteellinen tiedekunta fi
dc.contributor.tiedekunta Faculty of Mathematics and Science en
dc.contributor.yliopisto University of Jyväskylä en
dc.contributor.yliopisto Jyväskylän yliopisto fi
dc.contributor.oppiaine fysiikka fi

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