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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Nukleare Astrophysik I

HK 18.4: Vortrag

Dienstag, 22. März 2011, 15:00–15:15, HS3

Coulomb Dissociation of ¹⁷Ne and its role for nuclear astrophysics — •Justyna Marganiec¹, Thomas Aumann^2,3, Michael Heil², Ralf Plag^2,4, and Felix Wamers^2,3 — ¹ExtreMe Matter Institute EMMI, GSI Darmstadt, Germany — ²Kernreaktion und Nuklear Astrophysik, GSI Darmstadt, Germany — ³Institut für Kernphysik, TU Darmstadt, Germany — ⁴Goethe-Universität, Frankfurt am Main, Germany

The study of the Coulomb break up of ¹⁷Ne gives us an access to information about the time-reversed reaction ¹⁵O(2p,γ)¹⁷Ne, which could serve as a bypass of ¹⁵O waiting point during the rp process, and move the initial CNO material towards heavier nuclei.

The three-body radiative capture can proceed sequentially (J. Görres, et al., Phys. Rev. C 51, 392, 1995) or directly from the three-body continuum (L.V. Grigorenko, M.V. Zhukov, Phys. Rev. C 72, 015803, 2005). It has been suggested that the reaction rate can be enhanced by a few orders of magnitude by taking into account the three-body continuum. In order to verify these calculations, the ¹⁵O(2p,γ)¹⁷Ne cross section has been investigated.

The experiment has been performed at the LAND/R³B setup at GSI, using the fragment separator FRS to select a ¹⁷Ne secondary beam.

This project is supported by BMBF, EU (EURONS), EMMI, and FIAS.