KADoNiS-p. The astrophysical p-process database

Full text: The KADoNiS-p project is an online database for cross sections relevant to the p-process. Nuclei heavier than iron on the proton-rich side of the valley of stability are produced by a superposition of processes summarised as 'p-process'. The main fraction of those isotopes are produced in the γ-process by photodisintegration reactions on pre-existing seed nuclei. As the neutron separation energy increases along the (γ, n) path, (γ, p) and (γ, α) reactions become dominant and divert the material towards lower masses. However, only the minority of the reactions used in network calculations are known experimentally, thus the cross sections for the largest fraction have to be inferred from statistical model calculations using the codes e.g. NON-SMOKER, TALYS. To predict the stellar reaction rates for photodisintegration reactions, usually the inverse reaction cross sections are measured [7]. Experimental proton- and alpha-induced reaction cross sections in the valley of stability can be used to finetune the statistical model calculations and make them more reliable for the extrapolation into the unknown regions. Up to now no compilation of the experimental data for the heavy charged particle reactions relevant for the p-process exists. For KADoNiS-p all existing experimental data from (p, γ), (p,n), (p, α), (α, γ), (α, n) and (α, p) reactions in or close to the respective Gamow window was collected and reviewed. In 2013 March a user-friendly database using the KADoNiS (Karlsruhe Astrophysical Database of Nucleosynthesis in Stars) framework was launched, including all available experimental data with cut-off date of August 2012 (www.kadonis.org/pprocess).