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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Nuclear Astrophysics IV

HK 49.6: Vortrag

Mittwoch, 13. März 2024, 19:00–19:15, HBR 14: HS 4

Towards a Doppler shift measurement of the 1 fs lifetime of the 6.79 MeV state in ¹⁵O — •Max Osswald^1,2, Daniel Bemmerer¹, Antonio Caciolli^3,4, Eliana Masha¹, Jakub Skowronski^3,4, Elia Pilotto^3,4, Steffen Turkat², and Bruno Poser^1,2 — ¹Helmholtz-Zentrum Dresden-Rossendorf (HZDR) — ²TU Dresden — ³INFN Sezione di Padova, Italy — ⁴Università degli Studi di Padova, Italy

The 6.79 MeV excited state in ¹⁵O plays an important role in nuclear astrophysics, because it is a subthreshold resonance that is significant for the low-energy extrapolation of the ¹⁴N(p,γ)¹⁵O reaction. This reaction controls the rate of the Bethe-Weizsäcker cycle of hydrogen burning. Its lifetime is on the level of 1-3 fs, with many recent experiments giving conflicting data. The present contribution will report on the first steps of the data analysis of a recent experiment using the AGATA γ-ray tracking array coupled with the CD silicon detector at Legnaro National Lab, Italy. The contribution will also cover some target stability measurements carried out at Dresdener Felsenkeller, Germany, prior to the Legnaro experiment.