Naslov
80Se(n,γ) cross-section measurement at CERN n_TOF

Autori
Babiano-Suarezg, V. ; ... ; Bosnar, Damir ; ... ; Žugec, Petar

Kolaboracija
N_TOF Collaboration

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, kratko priopćenje, znanstveni

Izvornik
Journal of Physics: Conference Series 1668 / - , 2020

Skup
9. Nuclear Physics in Astrophysics (NPA-IX)

Mjesto i datum
Frankfurt na Majni, Njemačka, 15.09.2019. - 20.09.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
80Se, neutron capture, neutron time of flight, n_TOF

Sažetak
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 79Se (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 80Se(n, γ) cross section directly affects the stellar yield of the "cold" branch leading to the formation of the s-only 82Kr. Experimentally, there exists only one previous measurement on 80Se 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA