Artículo
Thermal (n, γ) cross section and resonance integral of 171Tm
Autor/es | Heftrich, T.
Weigand, M. Düllmann, Ch. E. Eberhardt, Klaus Fiebiger, S. Glorius, J. Göbel, K. Guerrero Sánchez, Carlos Haas, R. Heinitz, S. Lerendegui Marco, Jorge |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2019 |
Fecha de depósito | 2020-05-18 |
Publicado en |
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Resumen | Background: About 50% of the heavy elements are produced in stars during the slow neutron capture process.
The analysis of branching points allows us to set constraints on the temperature and the neutron density in ... Background: About 50% of the heavy elements are produced in stars during the slow neutron capture process. The analysis of branching points allows us to set constraints on the temperature and the neutron density in the interior of stars. Purpose: The temperature dependence of the branch point 171Tm is weak. Hence, the 171Tm neutron capture cross section can be used to constrain the neutron density during the main component of the s process in thermally pulsing asymptotic giant branch (TP-AGB) stars. Methods: A 171Tm sample produced at the ILL was activated with thermal and epithermal neutrons at the TRIGA research reactor at the Johannes Gutenberg-Universität Mainz. Results: The thermal neutron capture cross section and the resonance integral have been measured for the first time to be σth = 9.9 ± 0.9 b and σRI = 193 ± 14 b. Conclusions: Based on our results, new estimations of the direct capture components’ impact on the Maxwellian-nAveraged cross sections (MACS) are possible. |
Identificador del proyecto | Programme (FP/2007-2013) |
Cita | Heftrich, T., Weigand, M., Düllmann, C.E., Eberhardt, K., Fiebiger, S., Glorius, J.,...,Lerendegui Marco, J. (2019). Thermal (n, γ) cross section and resonance integral of 171Tm. Physical Review C, 99 (6), 065810-1-065810-6. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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pubPhysRevC.99.065810.pdf | 548.2Kb | [PDF] | Ver/ | |