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HK: Fachverband Physik der Hadronen und Kerne

HK 62: Nukleare Astrophysik

HK 62.1: Group Report

Friday, March 23, 2012, 14:00–14:30, RW 2

Study of the ²H(α,γ)⁶Li reaction and recent progress at LUNA — •Daniel Bemmerer — Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany

In addition to the well-known ⁷Li problem of Big Bang nucleosynthesis, observations of ⁶Li in very metal poor stars hint at a possible Big Bang ⁶Li problem. Network calculations show that the ²H(α,γ)⁶Li reaction dominates ⁶Li production in the Big Bang, but there are no direct experimental data on this reaction at relevant energies. An experiment on this reaction is underway at the 400 kV underground accelerator LUNA in Gran Sasso/Italy, and preliminary data will be shown. In addition, recent LUNA work on the ¹⁵N(p,γ)¹⁶O, ¹⁷O(p,γ)¹⁸F, and ²⁵Mg(p,γ)²⁶Al reactions and a planned ²²Ne(p,γ)²³Na study will be briefly discussed, and an outlook will be given. – Supported in part by INFN and by DFG (BE 4100/2-1).