Improved lead and bismuth (n,gamma) cross sections and their astrophysical impact
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hdl:2117/10624
Tipus de documentText en actes de congrés
Data publicació2007
EditorEDP Sciences
Condicions d'accésAccés obert
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Abstract
A series of (n,γ) neutron capture measurements on the lead isotopes and bismuth have been carried out
at the CERN n TOF installation in the neutron energy range from 1 eV up to 1MeV. At n TOF, contaminations
due to scattered neutrons were reduced down to a negligible level by using improved γ-ray detectors with very low
neutron sensitivity. The background level has been determined precisely from a complementary measurement. Other
experimental effects related to the electronic threshold in the detectors and the angular distribution of the prompt
γ-rays were investigated via Monte Carlo simulations and could be taken in account in the analysis of the capture
data. With this set of measurements the energy differential (n,γ) cross sections of 204,206,207Pb and 209Bi have been
determined with good accuracy. The information obtained in this work becomes of interest for constraining r-process
calculations and in particular for the Th/U cosmochronometer.
CitacióCalviño, F. [et al.]. Improved lead and bismuth (n,gamma) cross sections and their astrophysical impact. A: International Conference on Nuclear Data for Science and Technology. "2007 International Conference on Nuclear Data for Science and Technology". Nice: EDP Sciences, 2007, p. 1311-1314.
ISBN978-2-7598-0090-2
Versió de l'editorhttp://nd2007.edpsciences.org/articles/ndata/pdf/2007/01/ndata07493.pdf
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