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80Se(n,?) cross-section measurement at CERN n TOF
- Source :
- Journal of physics / Conference series, 1668 (1), 012001
- Publication Year :
- 2020
- Publisher :
- Institute of Physics Publishing Ltd, 2020.
-
Abstract
- Radiative neutron capture cross section measurements are of fundamental importance for the study of the slow neutron capture (s-) process of nucleosynthesis. This mechanism is responsible for the formation of most elements heavier than iron in the Universe. Particularly relevant are branching nuclei along the s-process path, which are sensitive to the physical conditions of the stellar environment. One such example is the branching at $^{79}$Se (3.27 × 10$^{5}$ y), which shows a thermally dependent β-decay rate. However, an astrophysically consistent interpretation requires also the knowledge of the closest neighbour isotopes involved. In particular, the $^{80}$Se(n,γ) cross section directly affects the stellar yield of the "cold" branch leading to the formation of the s-only $^{82}$Kr. Experimentally, there exists only one previous measurement on $^{80}$Se using the time of flight (TOF) technique. However, the latter suffers from some limitations that are described in this presentation. These drawbacks have been significantly improved in a recent measurement at CERN n TOF. This contribution presents a summary of the latter measurement and the status of the data analysis.
Details
- Language :
- English
- ISSN :
- 17426588 and 17426596
- Database :
- OpenAIRE
- Journal :
- Journal of physics / Conference series, 1668 (1), 012001
- Accession number :
- edsair.od......3596..ffce1afb095eafe41e86f433f6f68892