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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Surface diffuseness correction in global mass formula
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Volume 734, Year 2014
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Description
By taking into account the surface diffuseness correction for unstable nuclei, the accuracy of the macroscopic-microscopic mass formula is further improved. The rms deviation with respect to essentially all the available mass data falls to 298 keV, crossing the 0.3 MeV accuracy threshold for the first time within the mean-field framework. Considering the surface effect of the symmetry potential which plays an important role in the evolution of the "neutron skin" toward the "neutron halo" of nuclei approaching the neutron drip line, we obtain an optimal value of the symmetry energy coefficient J = 30.16 MeV. With an accuracy of 258 keV for all the available neutron separation energies and of 237 keV for the α-decay Q-values of super-heavy nuclei, the proposed mass formula is particularly important not only for the reliable description of the r process of nucleosynthesis but also for the study of the synthesis of super-heavy nuclei. © 2014 The Authors.
Authors & Co-Authors
Meng, Jie
China, Beijing
State Key Laboratory of Nuclear Physics and Technology
China, Beijing
Beihang University
Statistics
Citations: 358
Authors: 1
Affiliations: 4
Identifiers
Doi:
10.1016/j.physletb.2014.05.049
ISSN:
03702693