Shell evolution and its indication on the isospin dependence of the spin-orbit splitting
2013 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 724, no 4-5, 247-252 p.Article in journal (Other academic) Published
The available experimental data on shell evolution indicate that the strength of the spin-orbit single-particle potential may be enhanced in neutron-rich nuclei. We observe that such a simple scheme destroys the harmonic oscillator magic numbers N = 8 and 20 and generates new magic numbers like N = 6, 14, 16, 32 and 34. The traditional magic numbers like N = 28 and 50 and N = 14 seen in O-22 are eroded in neutron-rich nuclei due to the sensitivity of larger-l orbitals to the depth of the central potential but they are more robust than the harmonic oscillator magic numbers. The N = 82 shell closure persists in neutron-rich nuclei while the previously proposed shell closures like N = 40 and 70 do not emerge. Both mechanisms contribute to enhancing the N = 56 and 90 gaps by splitting the 1d(5/2) and 0g(7/2) and the 0h(9/2) and 1f(7/2) orbitals.
Place, publisher, year, edition, pages
2013. Vol. 724, no 4-5, 247-252 p.
Shell evolution; Woods-Saxon potential; Spin-orbit coupling; Isospin dependence
IdentifiersURN: urn:nbn:se:kth:diva-103900DOI: 10.1016/j.physletb.2013.06.018ISI: 000322358500007ScopusID: 2-s2.0-84880315652OAI: oai:DiVA.org:kth-103900DiVA: diva2:562337
FunderSwedish Research Council, 621-2010-4723 621-2012-3805
QC 201605312012-10-242012-10-242016-05-31Bibliographically approved