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dc.contributor.authorEichler, M.
dc.contributor.authorSayar, W.
dc.contributor.authorArcones, A.
dc.contributor.authorRauscher, T.
dc.date.accessioned2019-08-20T12:39:52Z
dc.date.available2019-08-20T12:39:52Z
dc.date.issued2019-07-01
dc.identifier.citationEichler , M , Sayar , W , Arcones , A & Rauscher , T 2019 , ' Probing the Production of Actinides under Different r-process Conditions ' , Astrophysical Journal , vol. 879 , no. 1 , 47 . https://doi.org/10.3847/1538-4357/ab24cf
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 17211749
dc.identifier.otherPURE UUID: b08871ee-737e-4844-9890-c3d7cbe78cbc
dc.identifier.otherScopus: 85069505178
dc.identifier.urihttp://hdl.handle.net/2299/21611
dc.description.abstractSeveral extremely metal-poor stars are known to have an enhanced thorium abundance. These actinide-boost stars have likely inherited material from an r-process that operated under different conditions than the r-process that is reflected in most other metal-poor stars with no actinide enhancement. In this article, we explore the sensitivity of actinide production in r-process calculations to the hydrodynamical conditions as well as the nuclear physics. We find that the initial electron fraction Y e is the most important factor determining the actinide yields and that the abundance ratios between long-lived actinides and lanthanides like europium can vary for different conditions in our calculations. In our setup, conditions with high entropies systematically lead to lower actinide abundances relative to other r-process elements. Furthermore, actinide-enhanced ejecta can also be distinguished from the "regular" composition in other ways, most notably in the second r-process peak abundances.en
dc.format.extent16
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal
dc.subjectabundances
dc.subjectnuclear reactions
dc.subjectnucleosynthesis
dc.subjectstars: Abundances
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleProbing the Production of Actinides under Different r-process Conditionsen
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85069505178&partnerID=8YFLogxK
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.3847/1538-4357/ab24cf
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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