Back to Search
Start Over
Shell evolution approaching the N=20 island of inversion: Structure of 26Na
- Source :
- Physics Letters B, Vol 759, Iss C, Pp 417-423 (2016)
- Publication Year :
- 2016
- Publisher :
- Elsevier, 2016.
-
Abstract
- The levels in 26Na with single particle character have been observed for the first time using the d(25Na, pγ) reaction at 5 MeV/nucleon. The measured excitation energies and the deduced spectroscopic factors are in good overall agreement with (0+1)ħω shell model calculations performed in a complete spsdfp basis and incorporating a reduction in the N=20 gap. Notably, the 1p3/2 neutron configuration was found to play an enhanced role in the structure of the low-lying negative parity states in 26Na, compared to the isotone 28Al. Thus, the lowering of the 1p3/2 orbital relative to the 0f7/2 occurring in the neighbouring Z=10 and 12 nuclei – 25,27Ne and 27,29Mg – is seen also to occur at Z=11 and further strengthens the constraints on the modelling of the transition into the island of inversion.
Details
- Language :
- English
- ISSN :
- 03702693, 18732445, and 84042850
- Volume :
- 759
- Issue :
- C
- Database :
- Directory of Open Access Journals
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.23a98eb3a684650ad8404285038f2ab
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.physletb.2016.05.093