Extending the nuclear chart by continuum: from oxygen to titanium
Abstract
Nuclear masses ranging from O to Ti isotopes are systematically investigated with relativistic continuum Hartree-Bogoliubov (RCHB) theory, which can provide a proper treatment of pairing correlations in the presence of the continuum. From O to Ti isotopes, there are 402 nuclei predicted to be bound by the density functional PC-PK1. For the 234 nuclei with mass measured, the root mean square (rms) deviation is 2.23 MeV. It is found that the proton drip-lines predicted with various mass models are roughly the same and basically agree with the observation. The neutron drip-lines predicted, however, are quite different. Due to the continuum couplings, the neutron drip-line nuclei predicted are extended further neutron-rich than other mass models. By comparison with finite-range droplet model (FRDM), the neutron drip-line nucleus predicted by RCHB theory has respectively 2(O), 10(Ne), 10(Na), 6(Mg), 8(Al), 6(Si), 8(P), 6(S), 14(K), 10(Ca), 10(Sc), and 12(Ti) more neutrons.
Keywords
Cite
@article{arxiv.1309.3987,
title = {Extending the nuclear chart by continuum: from oxygen to titanium},
author = {Xiaoying Qu and Ying Chen and Shuangquan Zhang and Pengwei Zhao and Ik Jae Shin and Yeunhwan Lim and Youngman Kim and Jie Meng},
journal= {arXiv preprint arXiv:1309.3987},
year = {2013}
}
Comments
5 pages, 1 figure, SCIENCE CHINA Physics, Mechanics & Astronomy, in press