Eur. Phys. J. A (2006) 27: 287-300
https://doi.org/10.1140/epja/i2005-10274-0

Nuclear Structure and Reactions

The β-decay of ²²Al

¹ Laboratoire de Physique Corpusculaire Caen, ISMRA, 6 Bd du Mal Juin, F-14050, Caen, France
² Grand Accélérateur National d'Ions Lourds, Bd Henri Becquerel, B.P. 55027, F-14076, Caen, France
³ Centre d'Etudes Nucléaires de Bordeaux-Gradignan, F-33175, Gradignan, France
⁴ Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40014, Finland
⁵ Kernfysisch Versneller Instituut, Zernikelaan 25, 9747 AA, Groningen, The Netherlands
⁶ Institut de Physique Nucléaire de Lyon, Université Claude Bernard de Lyon, Villeurbanne, France
⁷ Department of Physics, University of York, YO10 5DD, Heslington, UK
⁸ IReS Strasbourg, 23 rue du Loess, BP 28, F-67037, Strasbourg, France
⁹ Lawrence Berkeley National Laboratory, 1 Cyclotron Road, 94720, Berkeley, CA, USA
¹⁰ Vakgroep Subatomaire en Stralingsfysica Universiteit Gent, Belgium
¹¹ Gesellschaft für Schwerionenforschung mbH, Planckstr. 1, 64291, Darmstadt, Germany

^* e-mail: achouri@lpccaen.in2p3.fr

Received: 24 December 2005
Accepted: 5 April 2006
Published online: 2 May 2006

Abstract

In an experiment performed at the LISE3 facility of GANIL, we studied the decay of ²²Al produced by the fragmentation of a ³⁶Ar primary beam. A β-decay half-life of T _1/2 = 91.1±0.5ms was measured. The β-delayed one- and two-proton emission as well as β-α and β-delayed γ-decays were measured and allowed us to establish a partial decay scheme for this nucleus. New levels were determined in the daughter nucleus ²²Mg. The comparison with model calculations strongly favours a spin-parity of I ^π = 4⁺ for the ground state of ²²Al.