Gießen 2007 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Kernphysik / Spektroskopie
HK 25.6: Talk
Wednesday, March 14, 2007, 12:30–12:45, D
The experimental determination of a nuclear matrix element for the double-beta decay of 96Zr through charge-exchange reactions — •H. Dohmann, D. Frekers, E.-W. Grewe, S. Hollstein, and J.-H. Thies — Institut für Kernphysik, Westfälische Wilhelms-Universität, D-48149 Münster
We have used the (d,2He)-reaction on 96Mo to determine the GT+ strength distribution in 96Nb. The (d,2He)-reaction has been established as a high-resolution probe, which selectively excites GT transitions in β+-direction. The experiment was performed at the KVI Groningen using the BBS spectrometer. Resolutions of 100 keV have routinely been achieved. The extracted GT+ strength is used to determine one part of the double-beta decay matrix element. The double-beta decay can be described by two sequential single beta decays. These decays can be investigated separately in charge exchange reactions on the initial and final nucleus using (d,2He) and (3He,t) as the alternatives to (n,p) and (p,n) reactions. In the present case we observe that most of the GT+-strength is concentrated in a single low lying state.