Evolution of $N=28$ shell closure in relativistic continuum Hartree-Bogoliubov theory

Abstract

The $N=28$ shell gap in sulfur, argon, calcium and titanium isotopes is investigated in the framework of relativistic continuum Hartree-Bogoliubov (RCHB) theory. The evolutions of neutron shell gap, separation energy, single particle energy and pairing energy are analyzed, and it is found that $N=28$ shell gap is quenched in sulfur isotopes but persists in argon, calcium and titanium isotopes. The evolution of $N=28$ shell gap in $N=28$ isotonic chain is discussed, and the erosion of $N=28$ shell gap is understood with the evolution of potential with proton number.

9 pages, 7 figures

References in corpus (23)

• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• New parametrization for the nuclear covariant energy density functional with point-coupling interaction
• Collapse of the N=28 shell closure in ${}^{42}$Si
• Halos in medium-heavy and heavy nuclei with covariant density functional theory in continuum
• A new effective interaction for $0\hslash \omega$ shell model calculations in the sdpf valence space
• Novel structure for magnetic rotation bands in 60Ni
• Systematic study of nuclear matrix elements in neutrinoless double-beta decay with a beyond mean-field covariant density functional theory
• Spin-isospin resonances: A self-consistent covariant description
• Isospin corrections for superallowed Fermi beta decay in self-consistent relativistic random phase approximation approaches
• A microscopic benchmark-study of triaxiality in low-lying states of 76Kr
• The neutron drip line: single-particle degrees of freedom and pairing properties as sources of theoretical uncertainties
• Covariant density functional theory for antimagnetic rotation
• Multiple chiral doublet bands of identical configuration in 103Rh
• Global study of beyond-mean-field correlation energies in covariant energy density functional theory using a collective Hamiltonian method
• Relativistic description of nuclear matrix elements in neutrinoless double-$\beta$ decay
• Energy Density Functional analysis of shape evolution in N=28 isotones
• Nonaxial-octupole Y_{32} correlations in N = 150 isotones from multidimensional constrained covariant density functional theories
• Crucial test for covariant density functional theory with new and accurate mass measurements from Sn to Pa
• Density-dependent deformed relativistic Hartree-Bogoliubov theory in continuum
• Multidimensionally-constrained relativistic mean-field study of triple-humped barriers in actinides
• Measurement of excited states in 40Si and evidence for weakening of the N=28 shell gap
• Mass Measurements Demonstrate a Strong N =28 Shell Gap in Argon
• In-beam gamma-ray spectroscopy of very neutron-rich nuclei: Excited states in 46S and 48Ar