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Odd-even staggering in neutron drip line nuclei
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0002-1406-5695
2016 (English)In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 951, 97-115 p.Article in journal (Refereed) PublishedText
Abstract [en]

We have done systematic Hartree-Fock-Bogoliubov calculations in coordinate space on the one-quasi-particle energies and binding energy odd-even staggering (OES) in semi-magic nuclei with the zero-range volume, mixed and surface pairing forces in order to explore the influence of their density dependence. The odd-N isotopes are calculated within the blocking scheme. The strengths for the pairing forces are determined in two schemes by fitting locally to reproduce pairing gap in 120Sn and globally to all available data on the OES of semi-magic nuclei with Z≥8. In the former calculations, there is a noticeable difference between the neutron mean gaps in neutron-rich O, Ca, Ni and Sn isotopes calculated with the surface pairing and those with the mixed and volume pairing. The difference gets much smaller if the globally optimized pairing strengths are employed. The heavier Pb isotopes show the opposite trend. Moreover, large differences between the mean gap and the OES may be expected in both calculations when one goes towards the neutron drip line.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 951, 97-115 p.
Keyword [en]
Density dependence, Hartree-Fock-Bogoliubov approach, Nuclear pairing, Odd-even staggering
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-186920DOI: 10.1016/j.nuclphysa.2016.03.056ISI: 000376795100007ScopusID: 2-s2.0-84962448801OAI: diva2:929217
Swedish Research Council, 621-2013-4323

QC 20160518

Available from: 2016-05-18 Created: 2016-05-16 Last updated: 2016-06-28Bibliographically approved

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Changizi, Sara A.Qi, Chong
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