Decay studies of nuclei from toT. Faestermann1, R. Schneider1, A. Stolz1, K. Sümmerer2, E. Wefers1, J. Friese1, H. Geissel2, M. Hellström2, 3, P. Kienle1, H.-J. Körner1, M. Mineva3, M. Münch1, G. Münzenberg2, C. Schlegel2, K. Schmidt2, P. Thirolf4, H. Weick2 and K. Zeitelhack1
1 Technische Universität München, 85748 Garching, Germany
2 Gesellschaft für Schwerionenforschung mbH, 64291 Darmstadt, Germany
3 Lund University, 22100 Lund, Sweden
4 Ludwig-Maximilians-Universität München, 85748 Garching, Germany
(Received 21 March 2002 / Published online: 31 October 2002)
Neutron deficient nuclei near have been produced by fragmentation of a GeV beam. The fragments were separated, identified and stopped in a highly segmented silicon strip detector stack. This detector measured the total energy of emitted -particles. -radiation was measured with surrounding detectors. The half-lives for many nuclides have been determined for the first time and give important information for the following topics: For the heaviest particle-stable odd-odd nuclei , and we observed for the first time fast -decays, compatible with superallowed Fermi transitions and confirmed such decays for , and . We have also observed long-lived T=0 states in some of these nuclei. We measured the half-lives of all rp-process waiting-point nuclei from up to . In addition we find the proton drip line nucleus to decay dominantly via -decay. To study the Gamov-Teller strength in the -decay near the doubly magic we measured the half-life, - and -spectrum of . We propose a level scheme for the daughter nuclide and deduce the Gamov-Teller strength . This is one of the largest values known.
21.10.Tg - Lifetimes.
23.40.Hc - Relation with nuclear matrix elements and nuclear structure.
23.50.+z - Decay by proton emission.
© Società Italiana di Fisica, Springer-Verlag 2002