Life on Earth - an Accident ?
Vendredi 24 juin 2016 14:00
- Duree : 1 heure
Lieu : ILL 4, Amphi Chadwick - 71 avenue des Martyrs - Grenoble
Orateur : Ulf-G. MEIβNER (Universität Bonn & Forschungszentrum Jülich)
The light elements like hydrogen and helium are generated in the Big Bang, while the life relevant elements like carbon and oxygen are produced in hot, old stars. The basic underlying process is nuclear fusion.
It is well known that the nuclear binding energies are only a small fraction of the nuclear masses. It has therefore been speculated that small changes in the parameters underlying the generation of atomic nuclei can lead to drastic changes in the relative abundances of the elements
In this talk, I address this issue based on the modern approach to the nuclear force problem and simulation techniques to calculate the properties of atomic nuclei. Here, I focus on the Big Bang nucleosynthesis and the so-called triple-alpha process, that lies at the heart of carbon production in stars. I further discuss some implications for our anthropic view of the Universe.
Prof. Dr Ulf-G. Meiner has been awarded the 2016 Lise Meitner prize for his outstanding work in the fields of experimental, theoretical or applied nuclear science by the European Physical Society.
Contact : goarin@ill.eu
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