Ponencia
Neutron capture cross sections for the Re/Os clock
Autor/es | Mosconi, M.
Mengoni, A. Heil, M. Capote del Villar, Ramón Lozano Leyva, Manuel Luis Quesada Molina, José Manuel Wisshak, K. |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2005 |
Fecha de depósito | 2020-07-28 |
Publicado en |
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ISBN/ISSN | 0094-243X (impreso) 1551-7616 (electrónico) |
Resumen | The radioactive decay of 187Re → 187Os (t 1/2 = 43 Gyr) is suited for dating the onset of heavy-element nucleosynthesis. The radiogenic contribution to the 187Os abundance is the difference between the natural abundance ... The radioactive decay of 187Re → 187Os (t 1/2 = 43 Gyr) is suited for dating the onset of heavy-element nucleosynthesis. The radiogenic contribution to the 187Os abundance is the difference between the natural abundance and the corresponding s-process component. This component can be obtained via the well-established σN systematics using the neighboring s-only isotope 186Os, provided the neutron-capture cross sections of both isotopes are known with sufficient accuracy. We report on a new set of experiments performed with a C 6D6 detector array at the n_TOF neutron spallation facility of CERN. The capture cross sections of 186Os, 187Os, and 188Os have been measured in the neutron-energy range between 1 eV and 1 MeV, and Maxwellian-averaged cross sections were deduced for the relevant thermal energies from kT=5 keV to 100 keV. |
Agencias financiadoras | European Commission (EC) |
Identificador del proyecto | FIKW-CT-2000-00107 |
Cita | Mosconi, M., Mengoni, A., Heil, M., Capote del Villar, R., Lozano Leyva, M.L., Quesada Molina, J.M. y Wisshak, K. (2005). Neutron capture cross sections for the Re/Os clock. En International Conference on Nuclear Data for Science and Technology (1335-1338), Santa Fe, Nuevo México, (Estados Unidos): AIP Publishing. |
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