Licǎ, R., Rotaru, F., Borge, M. J G et al. (36 more authors) (2017) Identification of the crossing point at N=21 between normal and intruder configurations. Physical Review C. 021301(R). p. 21301. ISSN 2469-9993
Abstract
The β− decay of 34Mg was used to study the 34Al nucleus through g-ray spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two β-decaying states in 34Al having spin-parity assignments Jπ=4−dominated by the normal configurationπ (d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2 . Their unknown ordering and relative energy have been the subject of debate for the placement of 34Al inside or outside the N=20 “island of inversion.” We report here that the 1+ intruder lies only 46.6 keV above the 4− ground state. In addition, a new half-life of T1/2=44.9(4)ms, that is twice as long as the previously measured 20(10) ms, has been determined for 34Mg. Large-scale shell-model calculations with the recently developed sdpf-u-mix interaction are compared with the new data and used to interpret the mechanisms at play at the very border of the N=20 island of inversion.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017, The Authors. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Social Sciences (York) > Economics and Related Studies (York) The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/L005727/1 |
Depositing User: | Pure (York) |
Date Deposited: | 07 Apr 2017 15:00 |
Last Modified: | 16 Oct 2024 13:41 |
Published Version: | https://doi.org/10.1103/PhysRevC.95.021301 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevC.95.021301 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:114771 |