8051 20260306110103.0 10.3390/galaxies12060089 DOI SCART-2026-0133 Van Eck, Sophie From the s-Process to the i-Process: A New Perspective on the Chemical Enrichment of Extrinsic Stars 2024 Separating stars enriched in the s- and r-processes of nucleosynthesis is usually achieved by analyzing the element ratios of s-process elements (like Ba or La) to r-process elements (like Eu). The situation becomes more complex when analyzing CEMP-rs stars, which are carbon-enriched metal-poor objects enriched in a mixture of s- and r-elements. These objects, possibly resulting from the i-process of nucleosynthesis, are notoriously difficult to classify based on elemental ratios. Recent theoretical studies have outlined, however, that the s-, i-, and r-processes produce distinct isotopic mixtures. Here, we propose to analyze a sample of stars known to be enriched in s, r, or r + s elements and to determine the odd-to-even isotopic ratio measured on atomic lines of barium, in order to validate or disprove their assignation. BELSPO/ FED-tWIN Prf-2020-033 BISTRO/ FED-tWIN Prf-2020-033 BISTRO NO nucleosynthesis metal-poor stars i-process Giribaldi, Riano Merle, Thibault Lambotte, Adrian Karinkuzhi, Drisya Goriely, Stéphane Choplin, Arthur Storm, Nicholas Gerber, Jeffrey Siess, Lionel Bergemann, Maria Jorissen, Alain Galaxies 12 2024 6 thibault.merle@ksb-orb.be https://www.mdpi.com/2075-4434/12/6/89 1099768 http://publi2-as.oma.be/record/8051/files/2024Galax..12...89V.pdf 4380 http://publi2-as.oma.be/record/8051/files/2024Galax..12...89V.gif?subformat=icon icon 5009 http://publi2-as.oma.be/record/8051/files/2024Galax..12...89V.jpg?subformat=icon-180 icon-180 published in REFERD