# Impact of the nuclear mass uncertainties on the r process

## TL;DR

This study investigates how uncertainties in nuclear mass models influence the simulation of the astrophysical r-process, affecting the predicted abundance patterns and conditions of nucleosynthesis.

## Contribution

It systematically assesses the impact of different nuclear mass models and beta-decay data on r-process nucleosynthesis simulations.

## Key findings

- Main features of solar r-process pattern are well reproduced.
- Nuclear mass uncertainties significantly affect r-process conditions.
- Different mass models lead to variations in abundance peak locations.

## Abstract

Based on a simple site-independent approach, we attempt to reproduce the solar $r$-process abundance with four nuclear mass models, and investigate the impact of the nuclear mass uncertainties on the $r$ process. In this paper, we first analyze the reliability of an adopted empirical formula for $\beta$-decay half-lives which is a key ingredient for the $r$ process. Then we apply four different mass tables to study the $r$-process nucleosynthesis together with the calculated $\beta$-decay half-lives, and the existing $\beta$-decay data from FRDM+QRPA is also considered for comparison. The numerical results show that the main features of the solar $r$-process pattern and the locations of the abundance peaks can be reproduced well via the $r$-process simulations. Moreover, we also find that the mass uncertainties can significantly affect the derived astrophysical conditions for the $r$-process site, and resulting in a remarkable impact on the $r$ process.