The ²²Ne(p,γ)²³Na reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle is active in asymptotic giant branch stars as well as in novae and contributes to the nucleosynthesis of neon and sodium isotopes. In order to reduce the uncertainties in the predicted nucleosynthesis yields, new experimental efforts to measure the ²²Ne(p,γ)²³Na cross section directly at the astrophysically relevant energies are needed.
The seminar talk will report on the recently concluded first phase of the ²²Ne(p,γ)²³Na experiment at LUNA. Using a windowless, isotopically enriched ²²Ne gas target and two high-purity germanium detectors, selected, previously unobserved low-energy resonances were studied. The preliminary results will be summarized, and an outlook on the second phase of the experiment with a 4pi summing detector will be given.
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Daniel Bemmerer
Helmholtz-Zentrum Dresden-Rossendorf
Germany