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arXiv · 1209.3377

Evolution of the N=28 shell closure: a test bench for nuclear forces

O. Sorlin·M. -G. Porquet
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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.

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O. Sorlin, M. -G. Porquet. 2012-09-15. Evolution of the N=28 shell closure: a test bench for nuclear forces. https://doi.org/10.1088/0031-8949%2F2013%2Ft152%2F014003

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