In order to carry out research at the forefront of fundamental nuclear science, our community of nuclear scientists profits from the diverse range of large research infrastructures (RIs) existing in Europe. In these RIs, we can learn how the nuclear forces arising from the interaction between the building blocks of neutrons and protons manifest themselves in the rich structure of nuclei, and how different isotopes of elements are synthesised in primeval stellar processes.
These European nuclear-physics community has made great efforts in the past to make the most efficient and effective use of these facilities by developing the most advanced and novel equipment needed to pursue the excellent scientific programmes proposed at them. But, in adition, these activities ensure a high-level of socioeconomic impact inducing multidisciplinary and application-oriented research. This has been done under the auspices of NuPECC (Nuclear Physics European Collaboration Committee) and drawing support from previous EC framework programmes.
The Theos Joint Research Activity (JRA)
TheoS (Theoretical Support for Nuclear Facilities in Europe) is a joint research activity of the ENSAR2 consortium. The main objective of TheoS is to provide a strong and reliable theoretical support to the experiments that will be performed at the TAs of ENSAR2, including the ESFRI projects FAIR, SPIRAL2 and ELI-NP. This goal will be reached by improving our knowledge of nuclei both starting from first principles and by improving existing phenomenological models in nuclear structure and reactions. Links with other areas of physics, like hadron physics and astrophysics, will be emphasised within TheoS. In addition, this JRA will build a community to coordinate the research in nuclear theory within Europe. To do so, a new impetus will be given to the theoretical modelling of nuclear structure and dynamics along two main areas of research:
1. The improvement of microscopic theories of nuclear structure by using, among other inputs, the recent progresses in Effective Field Theory (EFT) for low-energy nuclear physics. The purpose is to increase the predictive power for unstable nuclei of the models based on the mean-field approximation or going beyond mean-field (BMF).
2. The development of new reaction models able to describe accurately the processes through which nuclei are studied away from stability, and those that lead to the formation of chemical elements in astrophysical environments.