Eur. Phys. J. A 10, 73-84

Decay of proton-rich nuclei between and

J. Giovinazzo¹, B. Blank¹, C. Borcea², M. Chartier¹, S. Czajkowski¹, G. de France³, R. Grzywacz⁴, Z. Janas⁴, M. Lewitowicz³, F. de Oliveira Santos³, M. Pfützner⁴, M.S. Pravikoff¹ and J.C. Thomas<sup>1

1</sup>  Centre d'Etudes Nucléaires de Bordeaux-Gradignan, Le Haut-Vigneau, B.P. 120, F-33175 Gradignan Cedex, France
²  Institute of Atomic Physics, P.O. Box MG6, Bucharest-Margurele, Romania
³  Grand Accélérateur National d'Ions Lourds, B.P. 5027, F-14076 Caen Cedex, France
⁴  Institute of Experimental Physics, University of Warsaw, PL-00-681 Warsaw, Hoza 69, Poland

giovinaz@cenbg.in2p3.fr

(Received: 26 July 2000 / Revised version: 22 November 2000 Communicated by C. Signorini)

Abstract
Decay studies of very neutron-deficient nuclei ranging from ³⁹Ti to ⁴⁹Ni have been performed during a projectile fragmentation experiment at the GANIL/LISE3 separator. For all nuclei studied in this work, ^39,40Ti, ^42,43Cr, ⁴⁶Mn, ^45,46,47Fe and ⁴⁹Ni, half-lives and decay spectra have been measured. In a few cases, coincidence measurements helped to successfully identify the initial and final states of transitions. In these cases, partial decay scheme are proposed. For the most exotic isotopes, ³⁹Ti, ⁴²Cr, ⁴⁵Fe and ⁴⁹Ni, which are candidates for two-proton radioactivity from the ground state, no clear evidence of this process is seen in our spectra and we conclude rather on a delayed particle decay.

PACS
27.40.+z - .
21.10.Dr - Binding energies and masses.
23.50.+z - Decay by proton emission.
25.70.Mn - Projectile and target fragmentation.

© Società Italiana di Fisica, Springer-Verlag 2001