TY  - JOUR
A1  - Li, Jia Jie
A1  - Long, Wen Hui
A1  - Margueron, Jérôme
A1  - Van Giai, Nguyen
T1  - 48Si: An atypical nucleus?
T2  - Physics Letters B
N2  - Using the relativistic Hartree–Fock Lagrangian PKA1, we investigate the properties of the exotic nucleus 48Si, which is predicted to be an atypical nucleus characterized by i) the onset of doubly magicity, ii) its location at the drip line, iii) the presence of dual semi-bubble structure (distinct central depletion in both of neutron and proton density profiles) in the ground state, and iv) the occurrence of pairing reentrance at finite temperature. While not being new for each, these phenomena are found to simultaneously occur in 48Si. For instance, the dual semi-bubble structure reduces the spin–orbit splitting of low-ℓ orbitals and upraises the s orbitals, leading therefore to distinct N=34 and Z=14 magic shells in 48Si. Consequently, the doubly magicities provide extra stability for such extreme neutron-rich system at the drip line. Associating with the neutron shell N=34 and continuum above, the pairing correlations are reengaged interestingly at finite temperature. Theoretical nuclear modelings are known to be poorly predictive in general, and we asset our confidence in the prediction of our modeling on the fact that the predictions of PKA1 in various regions of the nuclear chart have systematically been found correct and more specifically in the region of pf shell. Whether our predictions are confirmed or not, 48Si provides a concrete benchmark for the understanding of the nature of nuclear force.
KW  - New magicity
KW  - Drip-line nucleus
KW  - Bubble-like structure
KW  - Pairing reentrance
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/54672
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-546724
SN  - 1873-2445
SN  - 0370-2693
VL  - 788.2019
SP  - 192
EP  - 197
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  -