Abstract
The O-15(2p, gamma)Ne-17 cross section has been studied by the inverse reaction, the Coulomb dissociation of Ne-17. The experiment has been performed at the GSI. The Ne-17 excitation energy prior to decay has been reconstructed by using the invariant-mass method. The preliminary differential and integral Coulomb dissociation cross sections (sigma(Coul)) have been extracted, which provide a photoabsorption (sigma(photo)) and a radiative capture cross section (sigma(cap)). Additionally, important information about the Ne-17 nuclear structure will be obtained. The analysis is in progress.
Highlights
X-ray bursts are one of the most fascinating places of explosive nucleosynthesis where proton capture reactions play an important role [1]
The X-ray burster is a binary system consisting of a red giant and a neutron star
It is characterized by a repeated sudden increase of X-ray emission, which is a consequence of a thermonuclear explosion ignited in the envelope of a compact and dense neutron star
Summary
X-ray bursts are one of the most fascinating places of explosive nucleosynthesis where proton capture reactions play an important role [1]. The X-ray burster is a binary system consisting of a red giant and a neutron star It is characterized by a repeated sudden increase of X-ray emission, which is a consequence of a thermonuclear explosion ignited in the envelope of a compact and dense neutron star. The accreted matter is heated and compressed, and the freshly accreted hydrogen and helium are ignited Under these conditions, the break-out from the hot CNO cycles can occur via α capture reactions triggering first the αp and subsequently the rp process. Very important for detailed nucleosynthesis calculations are accurate experimental input parameters, e.g. cross sections, which allow to decrease uncertainties and clarify the situation These cross sections are difficult to obtain experimentally, since the rp-process path lies along the proton dripline, and due to several particles in the entrance channel. Study of the 15O(2p, γ)17Ne Cross Section by Coulomb Dissociation of 17Ne . . . 231
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