The r-process with the Newly Developed High-precision Mass Model WS4

B. Zhao (赵斌)1 and S. Q. Zhang (张双全)2
Astrophysical Journal 874, 5 Link to Article [DOI: 10.3847/1538-4357/ab0702 ]
1School of Physics and Nuclear Energy Engineering, Beihang University Beijing 100191, People’s Republic of China
2School of Physics, Peking University, Beijing 100871, People’s Republic of China

The influence of the new mass model Weizsäcker–Skyrme 4 (WS4) on the r-process abundance distribution is investigated using the site-independent classical r-process and the site-dependent dynamical r-process models. The dynamical r-process calculations are performed under the neutrino-driven wind scenario. In comparison with the finite-range droplet model (FRDM) often used in r-process calculations, better agreement between the calculated abundance and the observed solar r-process abundance is found in both the classical and dynamical calculations by using the mass model WS4. The abundance underestimations at the A ~ 115, 140, and 200 mass regions encountered with the calculations using the FRDM is overcome to a large extent by using WS4.

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