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dc.contributor.authorStolze, Sanna
dc.date.accessioned2012-02-27T09:49:19Z
dc.date.available2012-02-27T09:49:19Z
dc.date.issued2011
dc.identifier.otheroai:jykdok.linneanet.fi:1194803
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/37452
dc.description.abstractIn this work the mean lifetime of the First 4+ state in 182Pt was determined by using the Recoil Distance Doppler-Shift method. The studied nuclei were produced in the 86Kr(100Mo, 4n)182Pt fusion-evaporation reaction. The RDDS method exploits the fact that the observed γ-ray energy depends on the velocity of the emitting nucleus. Using a degrader foil after the target enables measuring the intensities of γ-rays emitted before and after the degrader. The recoil-gated γγ spectra were analyzed separately for each target-to-degrader distance and the lifetime was determined with the Differential Decay Curve Method, which takes into account the lifetimes of the feeding states. The lifetime of the 4+ state in 182Pt was determined to be τ = 40:8(14) ps. This corresponds to a transition quadrupole moment of |Qt| = 6:90(12) eb. When comparing the quadrupole moment to other N = 104 isotones it is clear, even when taking into account the charge dependence of the quadrupole moment, that the quadrupole moment of the prolate 4+ state in 186Pb is significantly larger. Also the quadrupole moments decrease with decreasing Z. Before drawing any final conclusions about the collectivity of the prolate band in 182Pt it is neccessary to determine the lifetimes of other yrast excited states at low energies.
dc.format.extent32 sivua
dc.language.isoeng
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.rightsJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.titleDetermining the lifetime of the first 4⁺ state in ¹⁸²Pt
dc.identifier.urnURN:NBN:fi:jyu-201202271303
dc.type.dcmitypeTexten
dc.type.ontasotPro gradufi
dc.type.ontasotMaster’s thesisen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sciencesen
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineFysiikkafi
dc.contributor.oppiainePhysicsen
dc.date.updated2012-02-27T09:49:19Z
dc.rights.accesslevelopenAccessfi
dc.contributor.oppiainekoodi4021
dc.subject.ysofysiikka


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