Phys. Rev. Lett. 101, 142504 (2008) [4 pages]Intruder Configurations in the A=33 Isobars: 33Mg and 33AlReceived 2 July 2008; published 2 October 2008 The β decay of 33Mg (N=21) presented in this Letter reveals intruder configurations in both the parent and the daughter nucleus. The lowest excited states in the N=20 daughter nucleus, 33Al, are found to have nearly 2p-2h intruder configuration, thus extending the “island of inversion” beyond Mg. The allowed direct β-decay branch to the 5/2+ ground state of the daughter nucleus 33Al implies positive parity for the ground state of the parent 33Mg, contrary to an earlier suggestion of negative parity from a g-factor measurement. An admixture of 1p-1h and 3p-3h configurations is proposed for the ground state of 33Mg to explain all of the experimental observables. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.142504
DOI:
10.1103/PhysRevLett.101.142504
PACS:
23.20.Lv, 21.60.Cs, 23.40.−s, 27.30.+t
See AlsoComment: D. T. Yordanov, K. Blaum, M. De Rydt, M. Kowalska, R. Neugart, G. Neyens, and I. Hamamoto, Comment on “Intruder Configurations in the A=33 Isobars: 33Mg and 33Al”, Phys. Rev. Lett. 104, 129201 (2010). |
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