48Si: An atypical nucleus?
- 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.
Author: | Jia Jie LiORCiD, Wen Hui Long, Jérôme Margueron, Nguyen Van Giai |
---|---|
URN: | urn:nbn:de:hebis:30:3-546724 |
DOI: | https://doi.org/10.1016/j.physletb.2018.11.034 |
ISSN: | 1873-2445 |
ISSN: | 0370-2693 |
Parent Title (English): | Physics Letters B |
Publisher: | Elsevier |
Place of publication: | Amsterdam [u.a.] |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2019/01/10 |
Date of first Publication: | 2019/01/10 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2020/05/14 |
Tag: | Bubble-like structure; Drip-line nucleus; New magicity; Pairing reentrance |
Volume: | 788.2019 |
Page Number: | 6 |
First Page: | 192 |
Last Page: | 197 |
HeBIS-PPN: | 465583598 |
Institutes: | Physik / Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - Namensnennung 4.0 |