| Article | |
| Report number | arXiv:2006.02712 |
| Title | Examining the $N$ = 28 shell closure through high-precision mass measurements of $^{46-48}$Ar |
| Author(s) | Mougeot, M. (CSNSM, Orsay) ; Atanasov, D. (Heidelberg, Max Planck Inst. ; Dresden, Tech. U.) ; Barbieri, C. (Surrey U. ; Milan U. ; INFN, Milan) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Breitenfeld, M. (CERN) ; de Roubin, A. (Heidelberg, Max Planck Inst.) ; Duguet, T. (IRFU, Saclay ; Leuven U.) ; George, S. (Heidelberg, Max Planck Inst.) ; Herfurth, F. (Darmstadt, GSI) ; Herlert, A. (FAIR, Darmstadt) ; Holt, J.D. (TRIUMF) ; Karthein, J. (Heidelberg, Max Planck Inst. ; CERN) ; Lunney, D. (CSNSM, Orsay) ; Manea, V. (Heidelberg, Max Planck Inst. ; CERN) ; Navrátil, P. (TRIUMF) ; Neidherr, D. (Darmstadt, GSI) ; Rosenbusch, M. (Greifswald U.) ; Schweikhard, L. (Greifswald U.) ; Schwenk, A. (Darmstadt, Tech. Hochsch. ; Darmstadt, EMMI ; Heidelberg, Max Planck Inst.) ; Somà, V. (IRFU, Saclay) ; Welker, A. (Dresden, Tech. U. ; CERN) ; Wienholtz, F. (Greifswald U. ; CERN) ; Wolf, R.N. (Heidelberg, Max Planck Inst. ; ARC, CoEPP, Australia) ; Zuber, K. (Dresden, Tech. U.) |
| Publication | 2020-07-01 |
| Imprint | 2020-06-04 |
| Number of pages | 15 |
| Note | 17 pages, 14 figures |
| In: | Phys. Rev. C 102 (2020) 014301 |
| DOI | 10.1103/PhysRevC.102.014301 |
| Subject category | nucl-th ; Nuclear Physics - Theory ; nucl-ex ; Nuclear Physics - Experiment |
| Abstract | The strength of the $N$ = 28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of $^{46-48}$Ar, performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN. The new mass values are up to 90 times more precise than previous measurements. While they suggest the persistence of the $N$ = 28 shell closure for argon, we show that this conclusion has to be nuanced in light of the wealth of spectroscopic data and theoretical investigations performed with the \emph{SDPF-U} phenomenological shell model interaction. Our results are also compared with \emph{ab initio} calculations using the Valence Space In-Medium Similarity Renormalization Group and the Self-Consistent Green's Function approaches. Both calculations provide a very good account of mass systematics at and around $Z$ = 18 and, generally, a consistent description of the physics in this region. This combined analysis indicates that $^{46}$Ar is the transition between the closed-shell $^{48}$Ca and collective $^{44}$S. |
| Copyright/License | publication: © 2020-2024 authors preprint: (License: arXiv nonexclusive-distrib 1.0) |
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记录创建於2020-07-04，最後更新在2024-05-08
