Show simple item record

dc.contributor.authorVoss, F.
dc.contributor.authorWisshak, K.
dc.contributor.authorArlandini, C.
dc.contributor.authorKappeler, F.
dc.contributor.authorKazakov, L.
dc.contributor.authorRauscher, T.
dc.date.accessioned2013-09-26T09:00:14Z
dc.date.available2013-09-26T09:00:14Z
dc.date.issued1999-02
dc.identifier.citationVoss , F , Wisshak , K , Arlandini , C , Kappeler , F , Kazakov , L & Rauscher , T 1999 , ' Stellar neutron capture cross sections of Pr and Dy isotopes ' , Physical Review C , vol. 59 , no. 2 , pp. 1154-1170 .
dc.identifier.issn2469-9985
dc.identifier.otherPURE: 1634932
dc.identifier.otherPURE UUID: dc361a9b-974b-4349-97a9-8fcdf357021d
dc.identifier.otherWOS: 000078576600075
dc.identifier.otherScopus: 0033248763
dc.identifier.urihttp://hdl.handle.net/2299/11662
dc.description.abstractThe neutron capture cross sections of Pr-141, Dy-160, Dy-161, Dy-161, Dy-163 and Dy-164 have been measured in Be energy range from 3 to 225 keV at the Karlsruhe 3.75 MV Van de Graaff accelerator. Neutrons were produced via the Li-7(p,n)Be-7 reaction by bombarding metallic Li targets with a pulsed proton beam. Capture events were registered with the Karlsruhe 4 pi Barium Fluoride Detector. The cross sections were determined relative to the gold standard. For the first time the correction for undetected capture events was completely obtained from experimental information, using capture cascades derived from measurements with an analog-to-digital converter system. The cross section ratios could be determined with an overall uncertainty of 1-1.5 %, an average improvement compared to previous measurements by a factor 4. Maxwellian averaged neutron capture cross sections were calculated for thermal energies between kT = 8 keV and 100 keV. For most of the isotopes there is reasonable agreement with recent evaluations, but discrepancies of similar to 20% were obtained for Dy-160 and Dy-164. The experimental data were complemented by statistical model calculations in order to describe the cross section enhancements in the stellar environment. The astrophysical implications of the present data include the quest for the origin of Dy-160, the decomposition of the Dy abundances in the respective s- and r-process contributions, branchings of the s-process chain at the terrestrially stable isotopes Gd-157 and Dy-163, and the isotopically anomalous dysprosium in meteoritic inclusions. [S0556-2813(99)04002-9].en
dc.format.extent17
dc.language.isoeng
dc.relation.ispartofPhysical Review C
dc.subjectSTATE BETA-DECAY
dc.subjectBARIUM FLUORIDE DETECTOR
dc.subjectMODEL
dc.subjectPROCESS NUCLEOSYNTHESIS
dc.subjectSOLAR
dc.subjectDENSITY
dc.subjectRATES
dc.subjectS-PROCESS
dc.subjectABUNDANCES
dc.subjectTA-181
dc.titleStellar neutron capture cross sections of Pr and Dy isotopesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted1999-02
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record