NUCLEOSYNTHESIS: A FIELD WITH STILL MANY OPEN NUCLEAR PHYSICS QUESTIONS

Stellar nucleosynthesis is a vastly interdisciplinary field. There is a large number of different problems invoked calling for a variety of different and complementary research fields. Impressive progress has been made in the last decades in the various fields related to nude-osynthesis, especially experimental and theoretical nuclear physics, as well as in ground or space-based astronomical observations and astrophysical modelings. In spite of that success, major problems and puzzles remain. The three major nucleosynthesis processes called for to explain the origin of the elements heavier than iron are described and the major pending questions discussed. As far as nuclear physics is concerned, good quality nuclear data is known to be a necessary condition for a reliable model-ling of stellar nucleosynthesis. Through some specific examples, the need for further theoretical or experimental developments is also critically discussed in view of their impact on nucleosynthesis predictions.