August 13, 2015 | P. Möller, A. J. Sierk, T. Ichikawa, H. Sagawa
The paper presents an updated set of nuclear ground-state masses and deformations for 9318 nuclei ranging from $^{16}$O to $^{339}$O, based on the finite-range droplet macroscopic model and the folded-Yukawa single-particle microscopic model. The results are obtained using the same model as in the FRDM(1992) mass table but with improved treatment of deformation and fewer approximations due to advancements in computational power. The authors determine one additional macroscopic-model parameter, the density-symmetry coefficient $L$, which was not varied in the previous calculation. The model is optimized to fit ground-state masses of 2149 nuclei, with an error of 0.5595 MeV for the entire region and 0.3549 MeV for the region $N \geq 65$. The paper also provides masses in the FRLDM, which has an error of 0.6618 MeV for the entire region and 0.5181 MeV for the region $N \geq 65$. The FRLDM is suitable for studies of fission and has been widely applied elsewhere. The paper discusses the improvements made to the model, including the addition of a charge-asymmetry term and an exponential term to account for finite-range effects, and the use of a modified pairing model. The authors also present detailed comparisons of the new results with the previous FRDM(1992) and FRLDM(1992) mass tables, highlighting the improvements in accuracy and the ability to describe more exotic nuclear shapes.The paper presents an updated set of nuclear ground-state masses and deformations for 9318 nuclei ranging from $^{16}$O to $^{339}$O, based on the finite-range droplet macroscopic model and the folded-Yukawa single-particle microscopic model. The results are obtained using the same model as in the FRDM(1992) mass table but with improved treatment of deformation and fewer approximations due to advancements in computational power. The authors determine one additional macroscopic-model parameter, the density-symmetry coefficient $L$, which was not varied in the previous calculation. The model is optimized to fit ground-state masses of 2149 nuclei, with an error of 0.5595 MeV for the entire region and 0.3549 MeV for the region $N \geq 65$. The paper also provides masses in the FRLDM, which has an error of 0.6618 MeV for the entire region and 0.5181 MeV for the region $N \geq 65$. The FRLDM is suitable for studies of fission and has been widely applied elsewhere. The paper discusses the improvements made to the model, including the addition of a charge-asymmetry term and an exponential term to account for finite-range effects, and the use of a modified pairing model. The authors also present detailed comparisons of the new results with the previous FRDM(1992) and FRLDM(1992) mass tables, highlighting the improvements in accuracy and the ability to describe more exotic nuclear shapes.