Evolution of the N=28 shell closure: a test bench for nuclear forces
Abstract
The evolution of the N=28 shell closure is investigated far from stability. Using the latest results obtained from various experimental techniques, we discuss the main properties of the N=28 isotones, as well as those of the N=27 and N=29 isotones. Experimental results are confronted to various theoretical predictions. These studies pinpoint the effects of several terms of the nucleon-nucleon interaction, such as the central, the spin-orbit, the tensor and the three-body force components, to account for the modification of the N=28 shell gap and spin-orbit splittings. Analogies between the evolution of the N=28 shell closure and other magic numbers originating from the spin-orbit interaction are proposed (N=14,50, 82 and 90). More generally, questions related to the evolution of nuclear forces towards the drip-line, in bubble nuclei, and for nuclei involved in the r-process nucleosynthesis are proposed and discussed.
Cite
@article{arxiv.1209.3377,
title = {Evolution of the N=28 shell closure: a test bench for nuclear forces},
author = {O. Sorlin and M. -G. Porquet},
journal= {arXiv preprint arXiv:1209.3377},
year = {2015}
}
Comments
40 pages,15 figures, Procceedings Nobel Symposium 2012, accepted for publication in Physica Scripta