Structure of exotic isotope $^{9}$C via resonance elastic scattering.

Light exotic nuclei provide important insights into the understanding of nuclear forces at large neutron to proton ratios. The progress in development of modern theoretical approaches such as quantum Monte-Carlo calculations (QMC) and no-core shell model (NCSM) allows for predictions of properties of light nuclei (A$\le$12) from the basic principles. Unfortunately, experimental information on the structure of many light exotic isotopes is very incomplete making it difficult to judge the accuracy of the \textit{ab initio} models in case of large excess of neutrons or protons. The focus of this experimental study is the structure of neutron-deficient carbon isotope $^{9}$C. Only one excited state was known in this nucleus. Excited states in $^9$C were populated in resonance elastic scattering of protons on $^{8}$B using method of inverse kinematics and very thick target. The analysis was made using combined R-matrix - Continuum Shell Model approach. The structure of $^{9}$C will be discussed and comparison with the predictions of modern theoretical models will be made.