The decay of proton-rich nuclei in the mass A=36–56 region

C. Dossat (1) , N. Adimi (1) , F. Aksouh , F. Becker , A. Bey (1) , Bertram Blank , C. Borcea (2) , R. Borcea , A. Boston , M. Caamano , G. Canchel (1) , M. Chartier (1) , D. Cortina , S. Czajkowski (1) , G. de France (3) , Francois de Oliveira Santos (3) , Agnès Fleury (1) , G. Georgiev , J. Giovinazzo (1) , S. Grévy (3) , R. Grzywacz , M. Hellström (4) , M. Honma , Z. Janas , D. Karamanis (1) , J. Kurcewicz , M. Lewitowicz (3) , M.J. López Jiménez (1) , C. Mazzocchi (4) , I. Matea (3) , V. Maslov , P. Mayet (4) , C. Moore , M. Pfützner , M.S. Pravikoff (1) , M. Stanoiu (5) , I. Stefan (3) , J.C. Thomas (1, 3)

1 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
2 NIPNE - Horia Hulubei National Institute of Physics and Nuclear Engineering
3 GANIL - Grand Accélérateur National d'Ions Lourds
4 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
5 IPNO - Institut de Physique Nucléaire d'Orsay

In a series of experiments at the SISSI/LISE3 facility of GANIL conducted between 1999 and 2004, we have collected decay information for proton-rich nuclei between 36Ca and 56Zn. The data allowed us to study the decay properties of 26 nuclei. The main experimental information obtained for all nuclei is their β-decay half-life and their total β-delayed proton emission branching ratio. For many nuclei, individual proton groups and γ rays were identified and allowed us to establish first partial decay schemes for some of the nuclei studied. In addition, mass-excess values have been determined for some of the nuclei by means of the isobaric multiplet mass equation. For 50Ni, the decay via β-delayed two-proton emission could be tentatively identified. The decay of 49Ni allowed for the first time to identify the first 2+ state in 48Fe. The experimental data are confronted to model predictions for the half-life and the mass-excess values.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

C. Dossat, N. Adimi, F. Aksouh, F. Becker, A. Bey, et al.. The decay of proton-rich nuclei in the mass A=36–56 region. Nuclear Physics A, 2007, 792, pp.18-86. ⟨10.1016/j.nuclphysa.2007.05.004⟩. ⟨in2p3-00168314⟩