Shell closures in the N and Z=40–60 region for neutron and proton-rich nuclei

A systematic study of shell closures around N and Z=40–60 through beta decay Q-values, one nucleon separation energies and excited states is presented for different isospin chains. Shell closure at N=40 is found to be absent in neutron-rich nuclei (contrary to some existing discussions) but is indic...

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Bibliographic Details
Published inPhysics letters. B Vol. 649; no. 1; pp. 31 - 34
Main Author Kanungo, R.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 24.05.2007
Elsevier Science
Subjects
Beta decay Q-value
Exact sciences and technology
Nuclear physics
Physics
Separation energy
Shell closure
The physics of elementary particles and fields
Beta decay Q-value
21.10.-k
21.10.Dr
Shell closure
Separation energy
Persistence
Protons
Isospin
Beta decay
N shell
Neutrons
Nucleons
Excited states
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Summary:A systematic study of shell closures around N and Z=40–60 through beta decay Q-values, one nucleon separation energies and excited states is presented for different isospin chains. Shell closure at N=40 is found to be absent in neutron-rich nuclei (contrary to some existing discussions) but is indicated in nuclei with Tz⩽1 within errors. The persistence of the N and Z=50 shell closure is observed, together with evidence of sub-shell closure at N=56 in neutron-rich nuclei. The sub-shell closure at Z=40, that exists for neutron-rich nuclei, is found to disappear for Tz=2.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2007.03.044