Personal web page : http://irfu.cea.fr/dphn/Phocea/Vie_des_labos/Ast/ast_visu.php?id_ast=2105
Laboratory link : http://irfu.cea.fr/dphn/Phocea/Vie_des_labos/Ast/ast_sstheme.php?id_ast=186&id_unit=7
Nuclear reactions between a light particle and an atomic nucleus with energies around GeV occur in various domains, namely nuclear waste transmutation, hadron therapy, neutron sources, radiation shielding (accelerators and space), and the study of meteorites. At Irfu/DPhN we develop such a nuclear reaction model.
Our code, INCL (Intranuclear cascade Liège), is developed for more than twenty years with the university of Liège. It is recognized for its sound bases and is implemented in several particle transport codes (Geant4, Phits, MCNPX). Until 2011, its range of application covered projectile energies from ~100 MeV up to 2-3 GeV. It was then extended to 10-20 GeV by adding, first, multiple pion emission channels and, second, strange particles (K, Lambda, Sigma). With the latter particles the goal was not only better manage of the cosmic ray spectrum, but also to get the possibility to produce hypernuclei, which are studied in several facilities (FAIR, JPARC, JLab).
Still related to hypernucleus and cosmic ray, the topic of this thesis will an upgrade of INCL in another direction. Our model treats nucleons , pions an kaons as projectiles, and we are going to add electromagnetic probes and antiprotons. The electromagnetic probe will enable us to study hypernuclei produced at JLab (electron) and to study the impact of muons penetrating deeply the planets. Antiproton spectrum, in cosmic rays, was measured by the PAMELA experiment recently. Although much less numerous compared to protons, their interactions with interstellar bodies will be interesting to investigate. Antiprotons as projectile will be also an opportunity to compare our calculation results to the data measured at FAIR on hypernucleus production. Already available are the data with the antiproton beam from LEAR (Cern) on strange particle and hypernucleus production. Adding Ksi production could be also interesting, since this strange particle will be produced at FAIR, and also JPARC with a Kaon beam, to build S=-2 hypernuclei.
The student will include those new projectiles in INCL. The reaction mechanisms of those particles with nucleons and the nucleus should be studied before, and, after, a careful benchmark will be done to test the reliability. Sound knowledge of hadronic physics, nuclear physics and C++ is required. The new version of INCL will be eventually implemented in Geant4 and the student will be member of the Geant4 collaboration. Considering cosmic ray, he/she will collaborate with I. Leya, University of Berne, expert in interactions between cosmic rays and interstellar bodies.