By the same authors

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From the same journal

Identification of the crossing point at N=21 between normal and intruder configurations

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  • R. Licǎ
  • F. Rotaru
  • M. J G Borge
  • S. Grévy
  • F. Negoiţǎ
  • A. Poves
  • O. Sorlin
  • R. Borcea
  • C. Costache
  • H. De Witte
  • L. M. Fraile
  • P. T. Greenlees
  • M. Huyse
  • A. Ionescu
  • S. Kisyov
  • J. Konki
  • I. Lazarus
  • M. Madurga
  • N. Mǎrginean
  • R. Mǎrginean
  • C. Mihai
  • R. E. Mihai
  • A. Negret
  • R. D. Page
  • J. Pakarinen
  • S. Pascu
  • V. Pucknell
  • P. Rahkila
  • E. Rapisarda
  • A. Şerban
  • C. O. Sotty
  • L. Stan
  • M. Stǎnoiu
  • O. Tengblad
  • A. Turturicǎ
  • P. Van Duppen
  • N. Warr


Publication details

JournalPhysical Review C
DateAccepted/In press - 25 Jan 2017
DatePublished (current) - 9 Feb 2017
Issue number2
Number of pages1
Pages (from-to)21301
Original languageEnglish


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.

Bibliographical note

© 2017, The Authors.


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