Neutron capture on¹³⁰Sn duringr-process freeze-out

Abstract

Abstract. We examine the role of neutron capture on 130Sn during r-process freezeout in the neutrino-driven wind environment of the core-collapse supernova. We find that the global r-process abundance pattern is sensitive to the magnitude of the neutron capture cross section of Sn, but also a shift in the distribution of material in the rare earth and third peak regions.arXiv:0806.3895v1 [nucl-th]

Theoretical uncertainty of(α,n)reactions relevant for the nucleosynthesis of lightr-processnuclei in neutrino-driven winds

“…In the last years, there have been numerous studies on the role of neutron-capture rates in the nucleosynthesis of heavy elements. These studies focused on understanding the sources of uncertainty of the calculated rates [12,13], and evaluating the impact of these uncertainties in network-calculated abundances [14][15][16][17]. On the contrary, equivalent studies on charge-particle reactions are scarce [9,18,19], even though they are known to play a crucial role in the synthesis of light r-process nuclei (from Fe to Ag) through the α (or charge-particle) process (see e.g.…”

β-Delayed Neutron Spectroscopy Using Trapped Radioactive Ions

“…Delayed-neutron measurements aid in the understanding of the nuclear structure of neutronrich nuclei [12][13][14][15] and are needed to improve nuclearstructure models [16] and empirical predictions [17] used to determine the properties of nuclei for which no data exists. High quality data also has the potential to help determine neutron-capture rates [18,19] for neutron-rich isotopes needed to understand the non-equilibrium phase of r-process nucleosynthesis [20][21][22] and to support the stockpile stewardship mission [23,24].…”

Advances in instrumentation for nuclear astrophysics

“…32,33 Crucial to the total neutron capture rate on 130 Sn is direct capture through bound states in 131 Sn. Particularly important to the direct-capture cross section is the location of states with significant spectroscopic overlap with a single = 1 neutron coupled to 130 Sn, which correspond to the 3p 3/2 and 3p 1/2 shell-model states above the N = 82 shell closure.…”