Investigation of the CNO-break-out reaction: ¹⁵O(2p,γ)¹⁷Ne by the Coulomb dissociation of ¹⁷Ne

By the Coulomb dissociation of ¹⁷Ne, the time-reversed reaction ¹⁵O(2p, γ)¹⁷Ne has been investigated. This reaction might play an important role in the rp process, as a bypass of the ¹⁵O waiting point. The secondary ¹⁷Ne ion beam of 500 AMeV has been dissociated on a Pb target, and the reaction products have been recorded with the LAND-R³B experimental setup (GSI). This experiment allows to determine the Coulomb dissociation cross section σ_Coul, which can be converted into a photo-absorption cross section σ_photo, and a radiative-capture cross section σ_cap for the ¹⁵O(2p,γ) ¹⁷Ne reaction. Additionally, informations about the structure of the ¹⁷Ne nucleus, a possible two-proton halo, may be obtained. The analysis is still in progress.