LXXI International conference "NUCLEUS – 2021. Nuclear physics and elementary particle physics. Nuclear physics technologies"

New mass evaluation and its implication for the neutron-rich nucleosynthesis product yield

22 Sept 2021, 15:30

25m

Oral report Section 1. Experimental and theoretical studies of the properties of atomic nuclei. Section 1. Experimental and theoretical studies of the properties of atomic nuclei

Speaker

Elena Vladimirova (Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State)

Description

Estimates for experimentally unknown nuclear masses are obtained by a phenomenological approach based on a local mass relation for the residual neutron-proton interaction. The local mass relations method provides both high accuracy of isotope mass predictions and mathematical simplicity of calculations [1, 2]. Results based on different databases AME2012-2020 [3] are presented. Neutron-rich isotopes in the r-process region are considered in detail.
The rates of neutron capture reactions at temperatures of 0.1-10 GK are calculated using the TALYS program [4] with the obtained mass estimates. The resulting rates are compared with calculations based on other mass prediction approaches. The resulting rates are also applied to calculate the r-process products yield in standard scenarios using the SkyNet library [5].
The results presented in this work demonstrate sensitivity of nucleosynthesis calculations to nuclear characteristics and neutron dripline localization.

1. J. Janecke et al., At. Data Nucl. Data Tables 39, 265 (1988).
2. E.V. Vladimirova et al., Int. J. Mod. Phys. E 30, 2150025 (2021).
3. Meng Wang et al., Chin. Phys. C 45, 030003 (2021).
4. A.J. Koning et al., Nucl. Data Sheets 1, 155 (2019).
5. J. Lippuner, L.F. Roberts, ApJS. 1, 233 (2017).

Presentation materials

2021.09.22 — Vladimirova NUCLEUS.pdf