Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Nuclear Astrophysics IV

HK 50.3: Vortrag

Donnerstag, 17. März 2016, 15:00–15:15, S1/01 A04

Low-energy resonances in the ²²Ne(p,γ)²³Na reaction addressed with a 4π BGO summing detector — •Marcell Takács for the LUNA collaboration — Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden — TU Dresden

The ²²Ne(p,γ)²³Na reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle is active in asymptotic giant branch (AGB) stars as well as in novae, and contributes to the nucleosythesis 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.

In the first phase of the LUNA ²²Ne(p,γ)²³Na experiment, three new resonances have been discovered at 156-260 keV [1]. In the present talk, the results from the second experimental phase are reported. In this campaign, a 4π bismuth germanate summing detector has been used to address the lowest-energy resonances at 71 and 105 keV as well as direct capture. — Supported by NAVI (HGF VH-VI-417).

[1] F. Cavanna et al., Phys. Rev. Lett. in press, arXiv:1511.05329