Wilson, G. L., Catford, W. N., Orr, N. A. et al. (36 more authors) (2016) Shell evolution approaching the N=20 island of inversion : Structure of 26Na. Physics Letters B. pp. 417-423. ISSN 0370-2693
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)hω 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.
Metadata
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Keywords: | 81V35, Na, Nuclear structure, Shell migration, Transfer reactions, γ-Ray transitions | ||||
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Institution: | The University of York | ||||
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) The University of York > Faculty of Arts and Humanities (York) > History (York) The University of York > Faculty of Social Sciences (York) > Sociology (York) The University of York > Faculty of Sciences (York) > Biology (York) The University of York > Faculty of Sciences (York) > Chemistry (York) |
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Depositing User: | Pure (York) | ||||
Date Deposited: | 24 Jun 2016 09:28 | ||||
Last Modified: | 06 Dec 2023 11:23 | ||||
Published Version: | https://doi.org/10.1016/j.physletb.2016.05.093 | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1016/j.physletb.2016.05.093 | ||||
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