dc.creator | Capote, Roberto | es |
dc.creator | Lozano Leyva, Manuel Luis | es |
dc.creator | Quesada, J. | es |
dc.creator | Domingo Pardo, César | es |
dc.creator | Abbondanno, U. | es |
dc.creator | Aerts, G. | es |
dc.creator | Álvarez-Pol, H. | es |
dc.creator | Alvarez Velarde, F. | es |
dc.date.accessioned | 2017-07-11T13:44:01Z | |
dc.date.available | 2017-07-11T13:44:01Z | |
dc.date.issued | 2006-08-29 | |
dc.identifier.citation | Capote, R., Lozano Leyva, M.L., Quesada, J., Domingo Pardo, C., Abbondanno, U., Aerts, G.,...,Alvarez Velarde, F. (2006). New measurement of neutron capture resonances in 209 Bi. Physical Review C - Nuclear Physics, 74 (2), 025807-1-025807-10. | |
dc.identifier.issn | 0556-2813 (impreso) | es |
dc.identifier.issn | 1089-490X (electrónico) | es |
dc.identifier.uri | http://hdl.handle.net/11441/62368 | |
dc.description.abstract | The neutron capture cross section of 209 Bi has been measured at the CERN n TOF facility by employing the pulse-height-weighting technique. Improvements over previous measurements are mainly because of an
optimized detection system, which led to a practically negligible neutron sensitivity. Additional experimental sources of systematic error, such as the electronic threshold in the detectors, summing of γ-rays, internal electron
conversion, and the isomeric state in bismuth, have been taken into account.
γ-Ray absorption effects inside the sample have been corrected by employing a nonpolynomial weighting function. Because 209 Bi is the last stable isotope in the reaction path of the stellar s -process, the Maxwellian averaged capture cross section is important for the recycling of the reaction flow by α decays. In the relevant stellar range of thermal energies between
kT=5 and 8 keV our new capture rate is about 16% higher than the presently accepted value used for nucleosynthesis calculations. At this low temperature an important part of the heavy Pb-Bi isotopes are supposed to be synthesized by the s-process in the He shells of low mass, thermally pulsing asymptotic giant branch stars. With the improved set of cross sections we obtain an s-process fraction of 19±3% of the solar bismuth abundance, resulting in an r -process residual of 81±3%. The present (n, γ) cross-section measurement is also of relevance for the design of accelerator driven systems based on a liquid metal Pb/Bi spallation target. | es |
dc.description.sponsorship | Comisión Europea FIKW-CT-2000-00107 | es |
dc.description.sponsorship | Ministerio de Ciencia y Tecnología FPA2001- 0144-C05 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | American Physical Society | es |
dc.relation.ispartof | Physical Review C - Nuclear Physics, 74 (2), 025807-1-025807-10. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | New measurement of neutron capture resonances in 209 Bi | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP5/FIKW-CT-2000-00107 | es |
dc.relation.projectID | FPA2001- 0144-C05 | es |
dc.relation.publisherversion | https://doi.org/10.1103/PhysRevC.74.025807 | es |
dc.identifier.doi | 10.1103/PhysRevC.74.025807 | es |
idus.format.extent | 10 p. | es |
dc.journaltitle | Physical Review C - Nuclear Physics | es |
dc.publication.volumen | 74 | es |
dc.publication.issue | 2 | es |
dc.publication.initialPage | 025807-1 | es |
dc.publication.endPage | 025807-10 | es |
dc.contributor.funder | European Commission (EC) | |
dc.contributor.funder | Ministerio de Ciencia y Tecnología (MCYT). España | |