Eur. Phys. J. A 15, 185-188 (2002)
DOI: 10.1140/epja/i2001-10251-7

Decay studies of nuclei from to

T. Faestermann¹, R. Schneider¹, A. Stolz¹, K. Sümmerer², E. Wefers¹, J. Friese¹, H. Geissel², M. Hellström^{2, 3}, P. Kienle¹, H.-J. Körner¹, M. Mineva³, M. Münch¹, G. Münzenberg², C. Schlegel², K. Schmidt², P. Thirolf⁴, H. Weick² and K. Zeitelhack<sup>1

1</sup>  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

thomas.faestermann@ph.tum.de

(Received 21 March 2002 / Published online: 31 October 2002)

Abstract
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.

PACS
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