2012/09/26 by Z. P. Li, C. Y. Li, C.Y. Li +4 · 2 citations
Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic physics #Condensed matter physics #Excitation #Hamiltonian (control theory) #Isotope #Mean field theory #Neutron #Nuclear physics #Nuclear physics research studies #Physics #Quadrupole #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #nucl-th
paper · pdf · doi:10.1016/j.physletb.2012.09.061
5 pages, 4 figures, accepted for publication in Physics Letters B
arxiv created 2012/09/26 · openalex publication_date 2012/09/27 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The low-lying collective states in Sn isotopes are studied by a five-dimensional collective Hamiltonian with parameters determined from the triaxial relativistic mean-field calculations using the PC-PK1 energy density functional. The systematics for both the excitation energies of 2+1 states and B(E2;0+1→ 2+1) values are reproduced rather well, in particular, the enhanced E2 transitions in the neutron-deficient Sn isotopes with N<66. We show that the gradual degeneracy of neutron levels 1g7/2 and 2d5/2 around the Fermi surface leads to the increase of level density and consequently the enhanced paring correlations from N=66 to 58. It provokes a large quadrupole shape fluctuation around the spherical shape, and leads to an enhanced collectivity in the isotopes around N=58.