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Nan Liu (Boston University)26/05/2026, 10:50Invited talk (30min + 10min Q&A)
Presolar grains are microscopic meteoritic dust particles that condensed in the outflows of ancient stars and supernova ejecta before the formation of the Solar System, preserving a direct isotopic record of stellar nucleosynthesis and astrophysical processes. Most presolar grains originate from asymptotic giant branch (AGB) stars and core-collapse supernovae (CCSNe) [1]. Due to the long...
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Andrew M. Davis (University of Chicago)26/05/2026, 11:30Contributed talk (15min + 5min Q&A)
A 2022 review of the abundances of radioactive isotopes at the time of Solar System formation [1] is updated, based on new observations and inferences over the past five years. The key isotopes for early Solar System chronology are $^{26}$Al , $^{53}$Mn, and $^{182}$Hf.
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$^{26}$Al is very useful as a relative chronometer and is present in high enough abundance in the early Solar System to be a... -
Lorenzo Roberti (INFN)27/05/2026, 10:50Invited talk (30min + 10min Q&A)
Carbon-oxygen (C-O) shell mergers in the late evolutionary stages of massive stars play a crucial role in determining their final fate and have a significant impact on the pre-supernova and explosive nucleosynthesis. In this talk, I will explore the complex dynamics within C-O shells, and how these interactions drive the production of intermediate and heavy elements. In particular I will...
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Mr Joshua Issa (University of Victoria)27/05/2026, 11:30Contributed talk (15min + 5min Q&A)
O-C shell mergers in massive stars are astrophysical sites for the production of many radioactive isotopes such as $^{40}\mathrm{K}$, which heats rocky exoplanets, and $^{44}\mathrm{Ti}$ and $^{60}\mathrm{Fe}$, which are observed in supernova remnants. Mixing prescriptions used in 1D stellar evolution models of stars with O-C shell mergers do not capture features seen in 3D hydrodynamic...
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Anders Jerkstrand (Stockholm University)28/05/2026, 10:50Invited talk (30min + 10min Q&A)
Supernovae and kilonovae are explosive transients representing the deaths of massive stars and mergers of compact objects. In these explosions many radioactive elements are produced, the decay of which powers much of the electromagnetic display. I review the role of radioactivity in determining the observed supernova and kilonova properties, including the deposition physics and thermalization...
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Kenzie Smith (Michigan State University/FRIB)28/05/2026, 11:30Contributed talk (15min + 5min Q&A)
The Separator for Capture Reactions (SECAR) located in ReAccelerator Hall 3 (ReA3) at the Facility for Rare Isotope Beams (FRIB) is a next-generation recoil separator designed to directly measure radiative capture reaction rates in inverse kinematics. These reactions are critical to understanding phenomena such as X-ray bursts, novae, and supernovae, which play a key role in the...
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Pavel Denisenkov (University of Victoria)29/05/2026, 10:50Contributed talk (15min + 5min Q&A)
We investigate the production of the long-lived radioactive isotope K-40
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in low-mass asymptotic giant branch (AGB) stars, with a focus on quantifying
the impact of stellar model and nuclear physics uncertainties. Potassium-40 is
a key contributor to radiogenic heating in terrestrial planets,
yet its stellar origin and galactic evolution remain insufficiently well constrained.
Using a... -
Gavin Fowler (University of Chicago)29/05/2026, 11:30Contributed talk (15min + 5min Q&A)
Presolar grains help us to study the complex system of dying stars through their isotopic signatures. One important concept presolar grains help us explore is the neutron density and temperature of ejected material from AGB stars through measurements of isotopes impacted by s-process branching [1]. However, getting these grains is no simple task. Orgueil, a CI chondrite, contains ~10 ppm...
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