Mass predictions of superheavy nuclei from the systematics of $\alpha$-Decay Energies

TL;DR

This paper extends a method for predicting alpha-decay energies of superheavy nuclei, analyzing the impact of nuclear mass models on prediction accuracy and addressing periodic deviations observed in previous studies.

Contribution

It introduces an extended hybrid prediction method for superheavy nuclei and evaluates different nuclear mass models to improve accuracy.

Findings

The systematic deviation is linked to the nuclear mass model used.

Different nuclear mass models significantly affect prediction accuracy.

The extended method reduces periodic deviations in alpha-decay energy predictions.

Abstract

A recent proposed method for $\alpha$-decay energies ($Q_\alpha$) [J.M. Dong, W. Zuo, and W. Scheid, Phys. Rev. Lett. \textbf{107}, 012501 (2011)] can reproduce experimental data of superheavy nuclei (SHN) with an $rms$-value of less than 100 keV. However, a sinusoid-like periodic deviation from experiments, which limits the accuracy in predictions, is observed when using different reference nuclei. In this paper, we have further extended this hybrid method, i.e., to predict $Q_\alpha$ of the as-yet-unobserved SHN with the help of known nuclei. It is found that the systematic deviation in previous study is rooted in the nuclear mass model employed. By further analyzing the source of errors, different nuclear mass models are evaluated based on the same procedure.