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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Kern- und Teilchen-Astrophysik

HK 36.1: Gruppenbericht

Donnerstag, 13. März 2008, 16:30–17:00, 2B

Status and perspectives of the LUNA experiment at Gran Sasso/Italy — •Daniel Bemmerer¹, Ralf Kunz², Michele Marta¹, Claus Rolfs², Frank Strieder², and Hanns-Peter Trautvetter² for the LUNA collaboration — ¹Forschungszentrum Dresden-Rossendorf, 01328 Dresden, Germany — ²Institut für Experimentalphysik III, Ruhr-Universität Bochum, Bochum, Germany

The Laboratory Underground for Nuclear Astrophysics (LUNA) in the Gran Sasso underground facility, Italy, has been designed to measure low cross sections for astrophysical purposes. The ³He(α,γ)⁷Be study at LUNA has now been completed, and the final data will be shown here. During the year 2007, two measurement campaigns have been performed: First, a precision study of ground state capture in the ¹⁴N(p,γ)¹⁵O reaction with an impact on solar ¹³N and ¹⁵O neutrinos (contribution by M. Marta). Second, a study of the ²⁵Mg(p,γ)²⁶Al reaction producing radioactive ²⁶Al, a tracer of live nucleosynthesis in our galaxy (contribution by F. Strieder).

The scientific program for the next years at the current LUNA 400 kV accelerator includes the study of the ²H(α,γ)⁶Li reaction for big-bang nucleosynthesis and the study of the ¹⁵N(p,γ)¹⁶O reaction and several other reactions of the CNO cycles. Feasibility studies on selected cases will be presented.

The scientific program for the proposed new LUNA 3 MV accelerator will be discussed.