Abstract
The time-reversed reaction 15O(2p, γ)17Ne has been studied by the Coulomb dissociation technique. Secondary 17Ne ion beams at 500 AMeV have been produced by fragmentation reactions of 20Ne in a beryllium production target and dissociated on a secondary Pb target. The incoming beam and the reaction products have been identified with the kinematically complete LAND-R3B experimental setup at GSI. The excitation energy prior to decay has been reconstructed by using the invariant-mass method. The preliminary differential and integral Coulomb Dissociation cross sections (σCoul) have been calculated, which provide a photoabsorption (σphoto) and a radiative capture cross section (σcap). Additionally, important information about the nuclear structure of the 17Ne nucleus will be obtained. The analysis is in progress.
Highlights
Proton capture reactions play an important role in a nucleosynthesis process, especially in explosive nucleosynthesis such as X-ray bursts [1]
The slow CNO cycles can be broken out, and the rapid proton capture ( ) process, which is rp a sequence of proton captures and + decays and which is responsible for the production of proton-rich isotopes up to the mass 100 region, is initiated
Using the virtual-photon theory, the photoabsorption cross section can be obtained from the di↵erential Coulomb dissociation photo cross section
Summary
Proton capture reactions play an important role in a nucleosynthesis process, especially in explosive nucleosynthesis such as X-ray bursts [1]. Important photo cap information about the nuclear structure of the 17Ne nucleus will be obtained. In order to verify these calculations, the two-proton radiative capture cross sections of mentioned reactions should be determined. The experiment has been performed by means of the Coulomb dissociation method, which is typically used to investigate the nuclear structure of exotic nuclei.
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